subject:(Gravitational Collapse)

Washington University in St. Louis

1. Jin, Kejian. Critical Phenomena in Gravitational Collapses of Neutron Star Systems.

Degree: PhD, Physics, 2011, Washington University in St. Louis

URL: https://openscholarship.wustl.edu/etd/594

► We study critical phenomena in gravitational collapses of stellar objects based on numerical solutions of the Einstein equations. We discovered that stellar objects with large… (more)

Subjects/Keywords: Physics; Critical Phenomena; Gravitational Collapse

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APA (6^th Edition):

Jin, K. (2011). Critical Phenomena in Gravitational Collapses of Neutron Star Systems. (Doctoral Dissertation). Washington University in St. Louis. Retrieved from https://openscholarship.wustl.edu/etd/594

Chicago Manual of Style (16^th Edition):

Jin, Kejian. “Critical Phenomena in Gravitational Collapses of Neutron Star Systems.” 2011. Doctoral Dissertation, Washington University in St. Louis. Accessed January 15, 2021. https://openscholarship.wustl.edu/etd/594.

MLA Handbook (7^th Edition):

Jin, Kejian. “Critical Phenomena in Gravitational Collapses of Neutron Star Systems.” 2011. Web. 15 Jan 2021.

Vancouver:

Jin K. Critical Phenomena in Gravitational Collapses of Neutron Star Systems. [Internet] [Doctoral dissertation]. Washington University in St. Louis; 2011. [cited 2021 Jan 15]. Available from: https://openscholarship.wustl.edu/etd/594.

Council of Science Editors:

Jin K. Critical Phenomena in Gravitational Collapses of Neutron Star Systems. [Doctoral Dissertation]. Washington University in St. Louis; 2011. Available from: https://openscholarship.wustl.edu/etd/594

University of KwaZulu-Natal

2. Bogadi, Robert Sacha. Relativistic thermodynamics of radiating stars.

Degree: 2016, University of KwaZulu-Natal

URL: http://hdl.handle.net/10413/14876

► In this research, on the topic of relativistic thermodynamics of radiating stars, the following three case studies are investigated: Gravitational collapse in spacially isotropic coordinates… (more)

Subjects/Keywords: Relativistic thermodynamics.; Radiating stars.; Gravitational collapse.

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APA (6^th Edition):

Bogadi, R. S. (2016). Relativistic thermodynamics of radiating stars. (Thesis). University of KwaZulu-Natal. Retrieved from http://hdl.handle.net/10413/14876

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Bogadi, Robert Sacha. “Relativistic thermodynamics of radiating stars.” 2016. Thesis, University of KwaZulu-Natal. Accessed January 15, 2021. http://hdl.handle.net/10413/14876.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Bogadi, Robert Sacha. “Relativistic thermodynamics of radiating stars.” 2016. Web. 15 Jan 2021.

Vancouver:

Bogadi RS. Relativistic thermodynamics of radiating stars. [Internet] [Thesis]. University of KwaZulu-Natal; 2016. [cited 2021 Jan 15]. Available from: http://hdl.handle.net/10413/14876.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Bogadi RS. Relativistic thermodynamics of radiating stars. [Thesis]. University of KwaZulu-Natal; 2016. Available from: http://hdl.handle.net/10413/14876

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Oregon

3. Roma, Vincent. Astrophysics with Gravitational Wave Signals from Core-Collapse Supernovae.

Degree: PhD, Department of Physics, 2019, University of Oregon

URL: https://scholarsbank.uoregon.edu/xmlui/handle/1794/24907

► The next generation of gravitational wave detectors will improve the detection prospects for gravitational waves from core-collapse supernovae. The complex astrophysics involved in core-collapse supernovae… (more)

Subjects/Keywords: collapse; core; gravitational; SMEE; supernova; wave

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APA (6^th Edition):

Roma, V. (2019). Astrophysics with Gravitational Wave Signals from Core-Collapse Supernovae. (Doctoral Dissertation). University of Oregon. Retrieved from https://scholarsbank.uoregon.edu/xmlui/handle/1794/24907

Chicago Manual of Style (16^th Edition):

Roma, Vincent. “Astrophysics with Gravitational Wave Signals from Core-Collapse Supernovae.” 2019. Doctoral Dissertation, University of Oregon. Accessed January 15, 2021. https://scholarsbank.uoregon.edu/xmlui/handle/1794/24907.

MLA Handbook (7^th Edition):

Roma, Vincent. “Astrophysics with Gravitational Wave Signals from Core-Collapse Supernovae.” 2019. Web. 15 Jan 2021.

Vancouver:

Roma V. Astrophysics with Gravitational Wave Signals from Core-Collapse Supernovae. [Internet] [Doctoral dissertation]. University of Oregon; 2019. [cited 2021 Jan 15]. Available from: https://scholarsbank.uoregon.edu/xmlui/handle/1794/24907.

Council of Science Editors:

Roma V. Astrophysics with Gravitational Wave Signals from Core-Collapse Supernovae. [Doctoral Dissertation]. University of Oregon; 2019. Available from: https://scholarsbank.uoregon.edu/xmlui/handle/1794/24907

University of KwaZulu-Natal

4. Mkenyeleye, Maombi Daud. Investigation of gravitational collapse of generalized Vaidya spacetimes.

Degree: 2015, University of KwaZulu-Natal

URL: http://hdl.handle.net/10413/15594

► In this thesis, we study the gravitational collapse of generalized Vaidya spacetimes which describe a combination of lightlike and timelike matter elds, commonly known as… (more)

Subjects/Keywords: Theses - Applied Mathematics.; Gravitational collapse.; Vaidya spacetimes.; Gravity.

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APA (6^th Edition):

Mkenyeleye, M. D. (2015). Investigation of gravitational collapse of generalized Vaidya spacetimes. (Thesis). University of KwaZulu-Natal. Retrieved from http://hdl.handle.net/10413/15594

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Mkenyeleye, Maombi Daud. “Investigation of gravitational collapse of generalized Vaidya spacetimes.” 2015. Thesis, University of KwaZulu-Natal. Accessed January 15, 2021. http://hdl.handle.net/10413/15594.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Mkenyeleye, Maombi Daud. “Investigation of gravitational collapse of generalized Vaidya spacetimes.” 2015. Web. 15 Jan 2021.

Vancouver:

Mkenyeleye MD. Investigation of gravitational collapse of generalized Vaidya spacetimes. [Internet] [Thesis]. University of KwaZulu-Natal; 2015. [cited 2021 Jan 15]. Available from: http://hdl.handle.net/10413/15594.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Mkenyeleye MD. Investigation of gravitational collapse of generalized Vaidya spacetimes. [Thesis]. University of KwaZulu-Natal; 2015. Available from: http://hdl.handle.net/10413/15594

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Princeton University

5. Vartanyan, David. Towards an Understanding of Core-Collapse Supernovae .

Degree: PhD, 2019, Princeton University

URL: http://arks.princeton.edu/ark:/88435/dsp01h415pd486

► The explosion mechanism of core-collapse supernovae (CCSNe) is a long-standing astrophysical problem buttressed with over half a century of computational research. Neutrino heating of the… (more)

▼ The explosion mechanism of core-collapse supernovae (CCSNe) is a long-standing astrophysical problem buttressed with over half a century of computational research. Neutrino heating of the collapsing mantle, wherein a fraction of the profuse neutrino luminosity in a collapsing star deposits energy onto the stalled shock, remains the preferred explosion mechanism for garden-variety CCSNe. Recent improvements in neutrino physics and in supercomputer power jointly ushered in new capabilities for the study of CCSNe. F{\sc{ornax}} is an optimized state-of-the-art hydrodynamics/radiative transfer code with detailed microphysics and scalable design that effectively takes advantage of these developments. I implement F{\sc{ornax}} to provide a comprehensive, multi-dimensional study of CCSNe - horizontally-integrated, across a a broad suite of progenitor stars, and vertically-integrated, from explosion mechanism to observational signatures. I provide a broad introduction of the topic, the code F{\sc{ornax}}, and the rich history of research in CCSNe in Chapter\,\ref{ch:intro}. Chapter\,\ref{ch:micro} looks at the sensitive dependence of explosion outcome on neutrino microphysics, in particular the role of many-body interactions and inelastic neutrino scattering. Chapter\,\ref{ch:2D} builds on these results to identify drivers of explosion outcome in a series of 2D axisymmetric simulations. Chapter\,\ref{ch:3D} introduces the first 3D simulation by F{\sc{ornax}}. A 16-M_\odot progenitor is carried out to roughly one second post-bounce, exploding promptly and robustly. The results highlight the need to carry simulations out longer, to several seconds, to identify asymptotic explosion energies. In Chapter\,\ref{ch:obs}, I look at neutrino and gravitational wave observational signatures, and their correlations with core physical dynamics, with a series of 11 progenitors evolved in 3D. This is the largest suite of 3D simulations to date, allowing a study of global characteristics of a diverse set of progenitor stars. The synergistic study of neutrinos and gravitational waves in forthcoming detectors can be used to profitably study physical phenomena in the supernova core. CCSNe study has followed a Maslow hierarchy in ambition: first, producing successful explosions; second, producing robust explosion energies, and lastly, producing CCSNe consistent with observable diagnostics. My thesis establishes well the first point, embarks on the second, and courts the third. Advisors/Committee Members: Burrows, Adam S (advisor).

Subjects/Keywords: core-collapse supernovae; gravitational waves; neutrino physics; stars

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APA (6^th Edition):

Vartanyan, D. (2019). Towards an Understanding of Core-Collapse Supernovae . (Doctoral Dissertation). Princeton University. Retrieved from http://arks.princeton.edu/ark:/88435/dsp01h415pd486

Chicago Manual of Style (16^th Edition):

Vartanyan, David. “Towards an Understanding of Core-Collapse Supernovae .” 2019. Doctoral Dissertation, Princeton University. Accessed January 15, 2021. http://arks.princeton.edu/ark:/88435/dsp01h415pd486.

MLA Handbook (7^th Edition):

Vartanyan, David. “Towards an Understanding of Core-Collapse Supernovae .” 2019. Web. 15 Jan 2021.

Vancouver:

Vartanyan D. Towards an Understanding of Core-Collapse Supernovae . [Internet] [Doctoral dissertation]. Princeton University; 2019. [cited 2021 Jan 15]. Available from: http://arks.princeton.edu/ark:/88435/dsp01h415pd486.

Council of Science Editors:

Vartanyan D. Towards an Understanding of Core-Collapse Supernovae . [Doctoral Dissertation]. Princeton University; 2019. Available from: http://arks.princeton.edu/ark:/88435/dsp01h415pd486

Louisiana State University

6. Da Silva, Argenis Daniel. Global Positioning System in Curved Space-Time and Other Applications of General Relativity.

Degree: PhD, Physical Sciences and Mathematics, 2009, Louisiana State University

URL: etd-11062009-084659 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1137

► In this work, we present some applications of the theory of General Relativity. First, we show a numerical scheme to account for relativistic effects in… (more)

Subjects/Keywords: GRAVITATIONAL COLLAPSE; RELATIVITY; GPS

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APA (6^th Edition):

Da Silva, A. D. (2009). Global Positioning System in Curved Space-Time and Other Applications of General Relativity. (Doctoral Dissertation). Louisiana State University. Retrieved from etd-11062009-084659 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1137

Chicago Manual of Style (16^th Edition):

Da Silva, Argenis Daniel. “Global Positioning System in Curved Space-Time and Other Applications of General Relativity.” 2009. Doctoral Dissertation, Louisiana State University. Accessed January 15, 2021. etd-11062009-084659 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1137.

MLA Handbook (7^th Edition):

Da Silva, Argenis Daniel. “Global Positioning System in Curved Space-Time and Other Applications of General Relativity.” 2009. Web. 15 Jan 2021.

Vancouver:

Da Silva AD. Global Positioning System in Curved Space-Time and Other Applications of General Relativity. [Internet] [Doctoral dissertation]. Louisiana State University; 2009. [cited 2021 Jan 15]. Available from: etd-11062009-084659 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1137.

Council of Science Editors:

Da Silva AD. Global Positioning System in Curved Space-Time and Other Applications of General Relativity. [Doctoral Dissertation]. Louisiana State University; 2009. Available from: etd-11062009-084659 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1137

University of Cambridge

7. Rosca-Mead, Roxana. Gravitational collapse, compact objects and gravitational waves in General Relativity and modified gravity.

Degree: PhD, 2019, University of Cambridge

URL: https://doi.org/10.17863/CAM.53747 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.810065

► Since the upgrade of the two LIGO Detectors it has been an exciting time for General Relativity (GR) research, as soon after they were upgraded… (more)

▼ Since the upgrade of the two LIGO Detectors it has been an exciting time for General Relativity (GR) research, as soon after they were upgraded to advanced status GW150914, the first gravitational wave signal from the inspiral and merger of two black holes was detected. The following consistent detections (9 further black hole binaries and one neutron star system) and the introduction of the European interferometer Virgo, as well as other planned detectors such as KAGRA and IndiGO mark the start of a new era of Gravitational Wave Physics and Astrophysics. This provides us with a window into the dynamics of strong gravity as well as the opportunity to test modified gravity and alternative theories in the strong regime, by confirming deviations from GR or constraining such theories. Why is General Relativity not enough though? It has passed all the tests so far with flying colors; in addition, the gravitational waves detected so far have demonstrated excellent agreement with GR’s predictions. Despite all these successful tests, there are still important questions related to Dark Energy and Dark Matter left unexplained. As a consequence, a clearer understanding of modified gravity theories is needed as well as a catalogue of gravitational waves resulting from these theories that could be used in the analysis of interferometer data and for stochastic background and continuous wave searches. In this Thesis we provide source modelling for GR and one of the most popular candidates for modified gravity, Scalar Tensor (ST) theories, as well as look for smoking-gun signatures. We analyse the formation of compact objects from core collapse simulations of stars in massive ST theories over the astrophysically plausible range of stellar progenitor masses and metallicities, as well as a large part of the parameter space of this class of modified theories of gravity. Next we test the robustness of our results by expanding the simulations to ST theories with self-interacting potentials. Finally, we study the recoil resulting from black holes mergers by varying the orbital eccentricity in an attempt to amplify the kicks.

Subjects/Keywords: General Relativity; Modified gravity; Core collapse; Gravitational waves; Numerical relativity

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APA (6^th Edition):

Rosca-Mead, R. (2019). Gravitational collapse, compact objects and gravitational waves in General Relativity and modified gravity. (Doctoral Dissertation). University of Cambridge. Retrieved from https://doi.org/10.17863/CAM.53747 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.810065

Chicago Manual of Style (16^th Edition):

Rosca-Mead, Roxana. “Gravitational collapse, compact objects and gravitational waves in General Relativity and modified gravity.” 2019. Doctoral Dissertation, University of Cambridge. Accessed January 15, 2021. https://doi.org/10.17863/CAM.53747 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.810065.

MLA Handbook (7^th Edition):

Rosca-Mead, Roxana. “Gravitational collapse, compact objects and gravitational waves in General Relativity and modified gravity.” 2019. Web. 15 Jan 2021.

Vancouver:

Rosca-Mead R. Gravitational collapse, compact objects and gravitational waves in General Relativity and modified gravity. [Internet] [Doctoral dissertation]. University of Cambridge; 2019. [cited 2021 Jan 15]. Available from: https://doi.org/10.17863/CAM.53747 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.810065.

Council of Science Editors:

Rosca-Mead R. Gravitational collapse, compact objects and gravitational waves in General Relativity and modified gravity. [Doctoral Dissertation]. University of Cambridge; 2019. Available from: https://doi.org/10.17863/CAM.53747 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.810065

Rutgers University

8. Poorvin, Emily Rose. Scaled experimental models of gravitational collapse: analysis of structures formed during creation and retreat of erosional scarps.

Degree: MS, Geological Sciences, 2010, Rutgers University

URL: http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000053149

► This thesis presents the results of scaled experimental models of gravitational collapse, the non-catastrophic failure of an oversteepened cliff. The main modeling material is wet… (more)

▼ This thesis presents the results of scaled experimental models of gravitational collapse, the non-catastrophic failure of an oversteepened cliff. The main modeling material is wet clay, which simulates typical lithified, upper-crustal rocks; the nature-to-model scaling factor for size is ~105. Silicone polymer in one model simulates a highly ductile layer (e.g., salt). In all models, scarp creation involves gradual downcutting along a vertical surface. In the standard model (6 cm of clay with a density of 1.60 g/cm3), faults lengthen and link to form a main normal fault that dips towards and strikes parallel to the erosional scarp; the zone of deformation is narrow. Cross sections of the standard model show that the main fault is listric, most minor faults are listric and dip toward the erosional scarp, shallow layers dip toward the scarp whereas deep layers dip away from the scarp, and the base of the scarp bows out. Fault-heave analyses show that differential iii extension (increasing with depth and with proximity to the erosional scarp) accounts for these features. Geometric models of listric faults do not incorporate differential extension, and thus do not predict the layer geometries observed in the standard model. Models with stronger (denser) clay require taller scarp heights to initiate gravitational collapse. In the model with silicone polymer, deformation (conjugate faults and grabens) is distributed over a larger area compared to the standard model. Faults that form during scarp retreat (lateral removal of clay) evolve similarly to faults formed during scarp creation. A preliminary model with a curved erosional scarp yields a deformation zone that closely parallels the scarp. The Statfjord field (Norway), the Sirikit field (Thailand), and the Fairy Dell sea cliffs (Dorset, England) share some similarities with the standard model: listric faults that strike parallel to and dip towards the erosional scarp and layers rotated away from the erosional scarp; however, they do not have layers rotated toward the erosional scarp. Deformation in Canyonlands National Park is similar to that in the model with silicone polymer: conjugate faults and grabens are related to flow of a ductile unit toward the erosional scarp. Advisors/Committee Members: Poorvin, Emily Rose (author), Schlishe, Roy W (chair), Withjack, Martha O (internal member), Ashley, Gail M (internal member).

Subjects/Keywords: Geology, Structural; Gravitational collapse

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Poorvin, E. R. (2010). Scaled experimental models of gravitational collapse: analysis of structures formed during creation and retreat of erosional scarps. (Masters Thesis). Rutgers University. Retrieved from http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000053149

Chicago Manual of Style (16^th Edition):

Poorvin, Emily Rose. “Scaled experimental models of gravitational collapse: analysis of structures formed during creation and retreat of erosional scarps.” 2010. Masters Thesis, Rutgers University. Accessed January 15, 2021. http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000053149.

MLA Handbook (7^th Edition):

Poorvin, Emily Rose. “Scaled experimental models of gravitational collapse: analysis of structures formed during creation and retreat of erosional scarps.” 2010. Web. 15 Jan 2021.

Vancouver:

Poorvin ER. Scaled experimental models of gravitational collapse: analysis of structures formed during creation and retreat of erosional scarps. [Internet] [Masters thesis]. Rutgers University; 2010. [cited 2021 Jan 15]. Available from: http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000053149.

Council of Science Editors:

Poorvin ER. Scaled experimental models of gravitational collapse: analysis of structures formed during creation and retreat of erosional scarps. [Masters Thesis]. Rutgers University; 2010. Available from: http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000053149

University of Cambridge

9. Rosca-Mead, Roxana. Gravitational collapse, compact objects and gravitational waves in General Relativity and modified gravity.

Degree: PhD, 2019, University of Cambridge

URL: https://www.repository.cam.ac.uk/handle/1810/306660

► Since the upgrade of the two LIGO Detectors it has been an exciting time for General Relativity (GR) research, as soon after they were upgraded… (more)

▼ Since the upgrade of the two LIGO Detectors it has been an exciting time for General Relativity (GR) research, as soon after they were upgraded to advanced status GW150914, the first gravitational wave signal from the inspiral and merger of two black holes was detected. The following consistent detections (9 further black hole binaries and one neutron star system) and the introduction of the European interferometer Virgo, as well as other planned detectors such as KAGRA and IndiGO mark the start of a new era of Gravitational Wave Physics and Astrophysics. This provides us with a window into the dynamics of strong gravity as well as the opportunity to test modified gravity and alternative theories in the strong regime, by confirming deviations from GR or constraining such theories. Why is General Relativity not enough though? It has passed all the tests so far with flying colors; in addition, the gravitational waves detected so far have demonstrated excellent agreement with GR’s predictions. Despite all these successful tests, there are still important questions related to Dark Energy and Dark Matter left unexplained. As a consequence, a clearer understanding of modified gravity theories is needed as well as a catalogue of gravitational waves resulting from these theories that could be used in the analysis of interferometer data and for stochastic background and continuous wave searches. In this Thesis we provide source modelling for GR and one of the most popular candidates for modified gravity, Scalar Tensor (ST) theories, as well as look for smoking-gun signatures. We analyse the formation of compact objects from core collapse simulations of stars in massive ST theories over the astrophysically plausible range of stellar progenitor masses and metallicities, as well as a large part of the parameter space of this class of modified theories of gravity. Next we test the robustness of our results by expanding the simulations to ST theories with self-interacting potentials. Finally, we study the recoil resulting from black holes mergers by varying the orbital eccentricity in an attempt to amplify the kicks.

Subjects/Keywords: General Relativity; Modified gravity; Core collapse; Gravitational waves; Numerical relativity

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Rosca-Mead, R. (2019). Gravitational collapse, compact objects and gravitational waves in General Relativity and modified gravity. (Doctoral Dissertation). University of Cambridge. Retrieved from https://www.repository.cam.ac.uk/handle/1810/306660

Chicago Manual of Style (16^th Edition):

Rosca-Mead, Roxana. “Gravitational collapse, compact objects and gravitational waves in General Relativity and modified gravity.” 2019. Doctoral Dissertation, University of Cambridge. Accessed January 15, 2021. https://www.repository.cam.ac.uk/handle/1810/306660.

MLA Handbook (7^th Edition):

Rosca-Mead, Roxana. “Gravitational collapse, compact objects and gravitational waves in General Relativity and modified gravity.” 2019. Web. 15 Jan 2021.

Vancouver:

Rosca-Mead R. Gravitational collapse, compact objects and gravitational waves in General Relativity and modified gravity. [Internet] [Doctoral dissertation]. University of Cambridge; 2019. [cited 2021 Jan 15]. Available from: https://www.repository.cam.ac.uk/handle/1810/306660.

Council of Science Editors:

Rosca-Mead R. Gravitational collapse, compact objects and gravitational waves in General Relativity and modified gravity. [Doctoral Dissertation]. University of Cambridge; 2019. Available from: https://www.repository.cam.ac.uk/handle/1810/306660

10. Ntrekis, Konstantinos. Γενικευμένες θεωρίες βαρύτητας με μη-τετριμμένες ζεύξεις βαθμωτών πεδίων.

Degree: 2017, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ)

URL: http://hdl.handle.net/10442/hedi/41168

► Although General Relativity (GR) is a very successful theory, passing many tests in our solar system and also being supported by the recent detection of… (more)

▼ Although General Relativity (GR) is a very successful theory, passing many tests in our solar system and also being supported by the recent detection of gravitational waves, still remains an incomplete theory. The main goal of this research is the investigation of possible extensions and modifications of gravity in order to obtain a consistent and, if possible, problem-free theory. In particular, we aim to study what kinds of modifications are possible in order to acquire a theoretically justifiedframework, free of instabilities and pathologies. Since we are entering the ``gold age" of cosmology,with a huge amount of observational data one should systematically use these data in order to understand how the gravitational interaction works and enlighten issues that until recently were considered as fundamental and purely theoretical. Current observations suggest that the Universe undergoes a phase of accelerated expansion, something that the present theory of GR is not in position to explain. In order to solve problems like the one mentioned, theorists construct models of modified gravity that hope to describe the behavior of the Universe through its history. However, these modern theories have to be put to the test by observations coming from astrophysicists or else they are just pure mathematical models that do not represent realistic scenarios. A large class of modified gravity theories arise from the consideration of extra degrees of freedom, such as in Brans-Dicke, Galileon, Fab Four and the general Horndeski theories. The Horndeski theory includes scalar fields that are directly and non-minimally coupled to gravity. Constructing such models, implementing them into various cosmological scenarios, testing their validity through observation and constraining their parameter space is the main purpose of this research. The aforementioned objective consists of suitably generalizing and modifying the gravitational action, using non-minimally coupled scalar fields, requiring absence of various instabilities at the zeroth as well as the perturbative level and retrieving GR at a particular limit. By extracting the gravitational field equations one can obtain the corresponding solutions and formulate the various observables as functions of the parameters of the theory. One can then use observational data to examine whether these solutions are in agreement with the current knowledge of numerous cosmological aspects. Such an analysis can concern issues arising at the inflationary paradigm, the formation and properties of black holes and the ongoing state of our universe, the accelerated expansion. Some of the already published results of this Ph.D. thesis include the formulation of a suppression mechanism for the particle production during the inflation scenario, the breaking of the degeneracy of inflationary models through the measurement of the reheating temperature (during the reheating phase) after inflation, the gravitational collapse of a scalar field to the formation of a black hole and a…

Subjects/Keywords: Κοσμολογία; Κοσμολογικός πληθωρισμός; Σκοτεινή ενέργεια; Βαρυτική Κατάρρευση; Cosmology; Inflation; Dark energy; Gravitational Collapse

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APA (6^th Edition):

Ntrekis, K. (2017). Γενικευμένες θεωρίες βαρύτητας με μη-τετριμμένες ζεύξεις βαθμωτών πεδίων. (Thesis). National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Retrieved from http://hdl.handle.net/10442/hedi/41168

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ntrekis, Konstantinos. “Γενικευμένες θεωρίες βαρύτητας με μη-τετριμμένες ζεύξεις βαθμωτών πεδίων.” 2017. Thesis, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Accessed January 15, 2021. http://hdl.handle.net/10442/hedi/41168.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ntrekis, Konstantinos. “Γενικευμένες θεωρίες βαρύτητας με μη-τετριμμένες ζεύξεις βαθμωτών πεδίων.” 2017. Web. 15 Jan 2021.

Vancouver:

Ntrekis K. Γενικευμένες θεωρίες βαρύτητας με μη-τετριμμένες ζεύξεις βαθμωτών πεδίων. [Internet] [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2017. [cited 2021 Jan 15]. Available from: http://hdl.handle.net/10442/hedi/41168.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ntrekis K. Γενικευμένες θεωρίες βαρύτητας με μη-τετριμμένες ζεύξεις βαθμωτών πεδίων. [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2017. Available from: http://hdl.handle.net/10442/hedi/41168

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

11. Shukla, Shashank. Studies in spherical and non spherical gravitational collapse;.

Degree: 2014, V. B. S. Purvanchal University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/44128

newline

Advisors/Committee Members: Dubey, G S, Pandey, A N.

Subjects/Keywords: gravitational collapse; spherical and non spherical

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APA (6^th Edition):

Shukla, S. (2014). Studies in spherical and non spherical gravitational collapse;. (Thesis). V. B. S. Purvanchal University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/44128

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Shukla, Shashank. “Studies in spherical and non spherical gravitational collapse;.” 2014. Thesis, V. B. S. Purvanchal University. Accessed January 15, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/44128.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Shukla, Shashank. “Studies in spherical and non spherical gravitational collapse;.” 2014. Web. 15 Jan 2021.

Vancouver:

Shukla S. Studies in spherical and non spherical gravitational collapse;. [Internet] [Thesis]. V. B. S. Purvanchal University; 2014. [cited 2021 Jan 15]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/44128.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Shukla S. Studies in spherical and non spherical gravitational collapse;. [Thesis]. V. B. S. Purvanchal University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/44128

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Queensland

12. Khosla, Kiran E. Gravity as a classical information channel: consequences and proposals towards detecting wave function collapse.

Degree: School of Mathematics and Physics, 2019, University of Queensland

URL: http://espace.library.uq.edu.au/view/UQ:7507

► A consistent theory including gravitational effects in quantum mechanics has not been found. Although many different approaches have been proposed for theory of quantum gravity,… (more)

▼ A consistent theory including gravitational effects in quantum mechanics has not been found. Although many different approaches have been proposed for theory of quantum gravity, several authors have suggested that gravity may be fundamentally classical. As there is no experimental evidence for a fundamentally quantum vs. fundamentally classical theory of gravity, it is hoped that investigating the consequences of semiclassical gravity, one may propose an experiment to distinguish between the quantum or classical nature of gravity. As opto- and electromechanical devices allow quantum limited measurement and control over massive, mechanical degrees of freedom, they are ideal systems to test violations of standard quantum mechanics arising from gravitational effects. After a brief introduction to the background theory and literature review, we begin by introducing a semiclassical model of gravity based on quantum measurement and control. We show under which conditions the theory behaves like a collapse model, and how a Newtonian potential is recovered in the multi particle case.We then go on to analyse our semiclassical model in two scenarios: firstly in a cosmological setting, and secondly by considering quantum clocks on the surface of the earth. In the cosmological description, we show that a violation of energy conservation, resulting from our model, can be reinterpreted as a dark energy fluid in the spacetime, suggesting that perhaps local violations of conservations of energy may be resolved in a cosmological framework. Secondly, we derive a minimum, gravitational dephasing rate for quantum clocks under the semiclassical model, which unsurprisingly, is is well below the resolution of current state of the art clocks. The next chapters diverge from analysing the gravitational model, and instead focus on novel methods of manipulating and measuring micromechanical devices, that may be used to experimentally probe the results of the semi-classical theory. Firstly we show that a sequence of coherently controlled pulses in an optomechanical system can be used to directly probe the momentum of an oscillator - opening up the possibility for direct detection of momentum diffusion, which is a consequence of the semiclassical gravity model. Secondly, we introduce an electro-mechanical device, and sequence of control operations, that may be understood as an interferometer for the wave function of a mechanical oscillator coupled to a qubit. We show how the resulting interference pattern can distinguish between unitary evolution, thermalisation/decoherence, and a purely classical description of the mechanical oscillator. We also show how the qubit-oscillator interaction can be used generate arbitrary wave functions of the mechanical oscillator, using only classical qubit driving.

Subjects/Keywords: Gravitational decoherence; Quantum collapse models; Quantum optomechanics; Quantum information; 0206 Quantum Physics

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APA (6^th Edition):

Khosla, K. E. (2019). Gravity as a classical information channel: consequences and proposals towards detecting wave function collapse. (Thesis). University of Queensland. Retrieved from http://espace.library.uq.edu.au/view/UQ:7507

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Khosla, Kiran E. “Gravity as a classical information channel: consequences and proposals towards detecting wave function collapse.” 2019. Thesis, University of Queensland. Accessed January 15, 2021. http://espace.library.uq.edu.au/view/UQ:7507.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Khosla, Kiran E. “Gravity as a classical information channel: consequences and proposals towards detecting wave function collapse.” 2019. Web. 15 Jan 2021.

Vancouver:

Khosla KE. Gravity as a classical information channel: consequences and proposals towards detecting wave function collapse. [Internet] [Thesis]. University of Queensland; 2019. [cited 2021 Jan 15]. Available from: http://espace.library.uq.edu.au/view/UQ:7507.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Khosla KE. Gravity as a classical information channel: consequences and proposals towards detecting wave function collapse. [Thesis]. University of Queensland; 2019. Available from: http://espace.library.uq.edu.au/view/UQ:7507

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

13. Gailliot, Samuel Franklin. Statistical and Dimension Reduction Methodology for Detecting and Parametrizing Core-Collapse Supernovae.

Degree: 2020, Marquette University

URL: https://epublications.marquette.edu/theses_open/587

► This paper explores statistical and dimension reduction methodology in the context of detecting and parametrizing gravitational wave signal from core collapse supernovae. Gravitational wave interferometer… (more)

Subjects/Keywords: Core Collapse Supernovae; Dimension Reduction; Gravitational Waves; Principal Component Analysis; Applied Statistics

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APA (6^th Edition):

Gailliot, S. F. (2020). Statistical and Dimension Reduction Methodology for Detecting and Parametrizing Core-Collapse Supernovae. (Thesis). Marquette University. Retrieved from https://epublications.marquette.edu/theses_open/587

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Gailliot, Samuel Franklin. “Statistical and Dimension Reduction Methodology for Detecting and Parametrizing Core-Collapse Supernovae.” 2020. Thesis, Marquette University. Accessed January 15, 2021. https://epublications.marquette.edu/theses_open/587.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Gailliot, Samuel Franklin. “Statistical and Dimension Reduction Methodology for Detecting and Parametrizing Core-Collapse Supernovae.” 2020. Web. 15 Jan 2021.

Vancouver:

Gailliot SF. Statistical and Dimension Reduction Methodology for Detecting and Parametrizing Core-Collapse Supernovae. [Internet] [Thesis]. Marquette University; 2020. [cited 2021 Jan 15]. Available from: https://epublications.marquette.edu/theses_open/587.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Gailliot SF. Statistical and Dimension Reduction Methodology for Detecting and Parametrizing Core-Collapse Supernovae. [Thesis]. Marquette University; 2020. Available from: https://epublications.marquette.edu/theses_open/587

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Cincinnati

14. Eby, Joshua. Phenomenology and Astrophysics of Gravitationally-Bound Condensates of Axion-Like Particles.

Degree: PhD, Arts and Sciences: Physics, 2017, University of Cincinnati

URL: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1504868633515325

► Light, spin-0 particles are ubiquitous in theories of physics beyond the Standard Model, and many of these make good candidates for the identity of dark… (more)

Subjects/Keywords: Particle Physics; Dark Matter; Axions; Bose-Einstein Condensate; Bosenova; Gravitational Collapse; Beyond Standard Model

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APA (6^th Edition):

Eby, J. (2017). Phenomenology and Astrophysics of Gravitationally-Bound Condensates of Axion-Like Particles. (Doctoral Dissertation). University of Cincinnati. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ucin1504868633515325

Chicago Manual of Style (16^th Edition):

Eby, Joshua. “Phenomenology and Astrophysics of Gravitationally-Bound Condensates of Axion-Like Particles.” 2017. Doctoral Dissertation, University of Cincinnati. Accessed January 15, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1504868633515325.

MLA Handbook (7^th Edition):

Eby, Joshua. “Phenomenology and Astrophysics of Gravitationally-Bound Condensates of Axion-Like Particles.” 2017. Web. 15 Jan 2021.

Vancouver:

Eby J. Phenomenology and Astrophysics of Gravitationally-Bound Condensates of Axion-Like Particles. [Internet] [Doctoral dissertation]. University of Cincinnati; 2017. [cited 2021 Jan 15]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1504868633515325.

Council of Science Editors:

Eby J. Phenomenology and Astrophysics of Gravitationally-Bound Condensates of Axion-Like Particles. [Doctoral Dissertation]. University of Cincinnati; 2017. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1504868633515325

15. Uchida, Haruki. Black Hole Formation, Explosion and Gravitational Wave Emission from Rapidly Rotating Very Massive Stars .

Degree: 2019, Kyoto University

URL: http://hdl.handle.net/2433/242595

Subjects/Keywords: Massive stars; Gravitational collapse; Black holes; Numerical relativity; Gravitational waves; Supernovae

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APA (6^th Edition):

Uchida, H. (2019). Black Hole Formation, Explosion and Gravitational Wave Emission from Rapidly Rotating Very Massive Stars . (Thesis). Kyoto University. Retrieved from http://hdl.handle.net/2433/242595

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Uchida, Haruki. “Black Hole Formation, Explosion and Gravitational Wave Emission from Rapidly Rotating Very Massive Stars .” 2019. Thesis, Kyoto University. Accessed January 15, 2021. http://hdl.handle.net/2433/242595.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Uchida, Haruki. “Black Hole Formation, Explosion and Gravitational Wave Emission from Rapidly Rotating Very Massive Stars .” 2019. Web. 15 Jan 2021.

Vancouver:

Uchida H. Black Hole Formation, Explosion and Gravitational Wave Emission from Rapidly Rotating Very Massive Stars . [Internet] [Thesis]. Kyoto University; 2019. [cited 2021 Jan 15]. Available from: http://hdl.handle.net/2433/242595.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Uchida H. Black Hole Formation, Explosion and Gravitational Wave Emission from Rapidly Rotating Very Massive Stars . [Thesis]. Kyoto University; 2019. Available from: http://hdl.handle.net/2433/242595

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade do Estado do Rio de Janeiro

16. Otávio Goldoni Quina de Almeida. Colapso gravitacional na teoria de Hořava-Lifshitz no limite infravermelho.

Degree: PhD, 2015, Universidade do Estado do Rio de Janeiro

URL: http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=9739 ;

►

O objetivo desta tese é verificar se algumas soluções de matéria da teoria da relatividade geral também satisfazem as equações da teoria de Horava-Lifshitz no… (more)

▼

O objetivo desta tese é verificar se algumas soluções de matéria da teoria da relatividade geral também satisfazem as equações da teoria de Horava-Lifshitz no limite infravermelho. Para isso, partimos das soluções mais simples possíveis, tais como é o caso de um fluido de radiação nula e de poeira, conhecidas na relatividade geral, e encontramos que estas não correspondem a quaisquer soluções na teoria de gravitação de Hořava-Lifshitz para o limite de baixas energias, infravermelho, no qual esta teoria deveria se reduzir à anterior. Este resultado nos remete a novos desafios na direção de ajustes teóricos que permitam que esta teoria descreva corretamente tanto o cenário cosmológico quanto o de formação de estruturas, estáveis ou colapsadas. Para tornar o trabalho mais claro, é feita uma introdução à teoria de Hořava- Lifshitz, tema central deste trabalho, e como ela se acopla com a matéria.

The goal of this thesis is to study the behavior of some solutions of general relativity in Hořava-Lifshitz theory for the infrared limit. For this, we start at the simplest solutions that we know very well in general relativity, for example, a null radiation and dust fluid, and we find that these solutions do not match to any solutions of the Hořava-Lifshitz gravitational theory, for the low energy limit, in wich this theory needs to be equivalente of the general relativiy. This result lead us to a new theoretical chalenges in the direction of new theoretical settings which allow this theory to describe correctly a cosmological scenario and the formation of stable structures and collapsed as well. To make the work more explicit, we did an introduction explaining what is the Hořava-Lifshitz theory and how it coupling with the matter.

Advisors/Committee Members: Vitor Emanuel Rodino Lemes, Maria de Fátima Alves da Silva, Jaime Fernando Villas da Rocha, Luiz Guilherme Silva Duarte, Anzhong Wang, Maria Emília Xavier Guimarães, Rodrigo Maier.

Subjects/Keywords: Gravitação quântica; acoplamento; colapso gravitacional; Vaidya; poeira; Quantum gravity; coupling; gravitational collapse; Vaidya; dust; RELATIVIDADE E GRAVITACAO

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APA (6^th Edition):

Almeida, O. G. Q. d. (2015). Colapso gravitacional na teoria de Hořava-Lifshitz no limite infravermelho. (Doctoral Dissertation). Universidade do Estado do Rio de Janeiro. Retrieved from http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=9739 ;

Chicago Manual of Style (16^th Edition):

Almeida, Otávio Goldoni Quina de. “Colapso gravitacional na teoria de Hořava-Lifshitz no limite infravermelho.” 2015. Doctoral Dissertation, Universidade do Estado do Rio de Janeiro. Accessed January 15, 2021. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=9739 ;.

MLA Handbook (7^th Edition):

Almeida, Otávio Goldoni Quina de. “Colapso gravitacional na teoria de Hořava-Lifshitz no limite infravermelho.” 2015. Web. 15 Jan 2021.

Vancouver:

Almeida OGQd. Colapso gravitacional na teoria de Hořava-Lifshitz no limite infravermelho. [Internet] [Doctoral dissertation]. Universidade do Estado do Rio de Janeiro; 2015. [cited 2021 Jan 15]. Available from: http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=9739 ;.

Council of Science Editors:

Almeida OGQd. Colapso gravitacional na teoria de Hořava-Lifshitz no limite infravermelho. [Doctoral Dissertation]. Universidade do Estado do Rio de Janeiro; 2015. Available from: http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=9739 ;

Penn State University

17. Summerscales, Tiffany Zoe. Gravitational Wave Astronomy with LIGO: from Data to Science.

Degree: 2008, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/6918

► This thesis describes three LIGO data analysis projects. The first project is development of a procedure that whitens LIGO data (white data have the same… (more)

▼ This thesis describes three LIGO data analysis projects. The first project is development of a procedure that whitens LIGO data (white data have the same power at all frequencies) and breaks it into several non-overlapping frequency bands. The data can then be used by gravitational wave search algorithms that assume a white noise background. Breaking the data into frequency bands not only simplifies the whitening process but allows a rough frequency spectrum to be assigned to candidate events. A whitening figure of merit is also described and, in the case of data from LIGO's third science run, it is shown that the whitening procedure nearly always improves the whiteness of the data. The second project described in this thesis is development of a computationally inexpensive test that can be run quickly over LIGO data to flag times where data have been corrupted by a nonlinear coupling. The test is applied to LIGO data and is shown to flag segments whose bispectra contains similar features to the bispectra of data produced with a nonlinear model. Finally, the third project seeks to address two problems that one would confront if one tried to do core-collapse supernova astronomy with gravitational waves. The first problem involves extracting a short-duration gravitational waveform from the data produced by a network of detectors. The maximum entropy method is proposed as a solution to this deconvolution problem. The second problem involves deducing properties of the source from the recovered waveform when our source models are incomplete. We propose calculating the cross correlation between a recovered waveform and a catalog of waveforms associated with models having varying properties. The catalog waveform having the highest cross correlation with the recovered waveform is assumed to be associated with a model whose properties most closely resemble those of the source. The maximum entropy method is used to recover supernova waveforms from simulated LIGO data which are created assuming detector responses and white noise having amplitudes typical of recent LIGO science runs. Next, the recovered waveform is cross correlated with a catalog of waveforms and it is shown that the recovered waveform carries information about the type of bounce the core undergoes as well as the progenitor mass, angular momentum and degree of differential rotation for supernova occurring less than a few kpc away. Supernova waveforms are also recovered using maximum entropy from simulated data using actual LIGO data for noise and from hardware injections. Recovering signals from these data show that maximum entropy can successfully handle colored noise and imperfect knowledge of the LIGO detector responses. Advisors/Committee Members: Lee S Finn, Committee Chair/Co-Chair, Abhay Vasant Ashtekar, Committee Member, Pablo Laguna, Committee Member, James Jonathan Whitmore, Committee Member.

Subjects/Keywords: maximum entropy; core-collapse supernovae; LIGO; gravitational waves

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APA (6^th Edition):

Summerscales, T. Z. (2008). Gravitational Wave Astronomy with LIGO: from Data to Science. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/6918

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Summerscales, Tiffany Zoe. “Gravitational Wave Astronomy with LIGO: from Data to Science.” 2008. Thesis, Penn State University. Accessed January 15, 2021. https://submit-etda.libraries.psu.edu/catalog/6918.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Summerscales, Tiffany Zoe. “Gravitational Wave Astronomy with LIGO: from Data to Science.” 2008. Web. 15 Jan 2021.

Vancouver:

Summerscales TZ. Gravitational Wave Astronomy with LIGO: from Data to Science. [Internet] [Thesis]. Penn State University; 2008. [cited 2021 Jan 15]. Available from: https://submit-etda.libraries.psu.edu/catalog/6918.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Summerscales TZ. Gravitational Wave Astronomy with LIGO: from Data to Science. [Thesis]. Penn State University; 2008. Available from: https://submit-etda.libraries.psu.edu/catalog/6918

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade do Estado do Rio de Janeiro

18. Leone Santana de Melo Veneroni. Modelos de colapso gravitacional para um fluido anisotrópico com viscosidades e fluxo de calor.

Degree: Master, 2016, Universidade do Estado do Rio de Janeiro

URL: http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=11000 ;

►

Esta dissertação busca a modelagem de uma estrela compacta radiante em colapso gravitacional com fluxo de calor radial, viscosidade volumar e de cisalhamento, além de… (more)

▼

Esta dissertação busca a modelagem de uma estrela compacta radiante em colapso gravitacional com fluxo de calor radial, viscosidade volumar e de cisalhamento, além de pressões não isotrópicas nas direções principais. Sob a luz da relatividade geral, foram apresentadas duas soluções das equações de campo de Einstein com dependência temporal.Com o intuito de analisar um fluido minimamente realístico, foram estudadas quantidades físicas relevantes, tais como a função massa-energia e a luminosidade para um observador no infinito. O limite para a razão massa-raio decorre da imposição da validade de todas as condições de energia, regularidade e equilíbrio hidrostático no interior da estrela, pelo menos no instante inicial. Em seguida, foi investigada a evolução temporal da solução dependente do tempo. As condições de energia foram analisadas de modo a nos certificarmos se os objetos aqui modelados as mantinham satisfeitas durante todo o processo de colapso, assegurando a razoabilidade física dos modelos.

In this dissertation, we study the gravitational collapse of a radiating compact star composed of a fluid with radial heat flow, anisotropic pressures and with both bulk and shear viscosities. The time dependent solutions of Einstein field equations are presented. In order to analyze a more realistic fluid, we study the relevant physical quantities, such as mass-energy function and luminosity measured by an observer at infinity. The limit on the mass-to-radius ratio is derived using the validity of all energy, regularity, and hydrostatic equilibrium conditions inside the star, at least at the initial time. To make sure the astrophysical objects we investigate satisfy the energy conditions, we analyze them during the entire process of collapse. This ensures that our model is physically reasonable.

Advisors/Committee Members: Roberto Chan, Maria de Fátima Alves da Silva, Otávio Goldoni Quina de Almeida, Gustavo Pinheiro, Rafael Fernandes Aranha.

Subjects/Keywords: Anisotropic fluid; Heat flow; Gravitational collapse; Viscosidade; RELATIVIDADE E GRAVITACAO; Fluxo de calor; Colapso gravitacional; Fluido anisotrópico; Viscosity

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APA (6^th Edition):

Veneroni, L. S. d. M. (2016). Modelos de colapso gravitacional para um fluido anisotrópico com viscosidades e fluxo de calor. (Masters Thesis). Universidade do Estado do Rio de Janeiro. Retrieved from http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=11000 ;

Chicago Manual of Style (16^th Edition):

Veneroni, Leone Santana de Melo. “Modelos de colapso gravitacional para um fluido anisotrópico com viscosidades e fluxo de calor.” 2016. Masters Thesis, Universidade do Estado do Rio de Janeiro. Accessed January 15, 2021. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=11000 ;.

MLA Handbook (7^th Edition):

Veneroni, Leone Santana de Melo. “Modelos de colapso gravitacional para um fluido anisotrópico com viscosidades e fluxo de calor.” 2016. Web. 15 Jan 2021.

Vancouver:

Veneroni LSdM. Modelos de colapso gravitacional para um fluido anisotrópico com viscosidades e fluxo de calor. [Internet] [Masters thesis]. Universidade do Estado do Rio de Janeiro; 2016. [cited 2021 Jan 15]. Available from: http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=11000 ;.

Council of Science Editors:

Veneroni LSdM. Modelos de colapso gravitacional para um fluido anisotrópico com viscosidades e fluxo de calor. [Masters Thesis]. Universidade do Estado do Rio de Janeiro; 2016. Available from: http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=11000 ;

Baylor University

19. Wu, Rui. Gravitational collapse and formation of black holes in the Brans-Dicke theory of gravity with (2+1) dimensions.

Degree: MS, Physics., 2008, Baylor University

URL: http://hdl.handle.net/2104/5115

► In this thesis, the gravitational collapse of the Brans-Dicke scalar field and formation of black holes in 2+1 Gravity is examined. In contrast to general… (more)

Subjects/Keywords: Gravitational collapse.; Black holes (Astronomy).; Gravitation.; Scalar field theory.

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Wu, R. (2008). Gravitational collapse and formation of black holes in the Brans-Dicke theory of gravity with (2+1) dimensions. (Masters Thesis). Baylor University. Retrieved from http://hdl.handle.net/2104/5115

Chicago Manual of Style (16^th Edition):

Wu, Rui. “Gravitational collapse and formation of black holes in the Brans-Dicke theory of gravity with (2+1) dimensions.” 2008. Masters Thesis, Baylor University. Accessed January 15, 2021. http://hdl.handle.net/2104/5115.

MLA Handbook (7^th Edition):

Wu, Rui. “Gravitational collapse and formation of black holes in the Brans-Dicke theory of gravity with (2+1) dimensions.” 2008. Web. 15 Jan 2021.

Vancouver:

Wu R. Gravitational collapse and formation of black holes in the Brans-Dicke theory of gravity with (2+1) dimensions. [Internet] [Masters thesis]. Baylor University; 2008. [cited 2021 Jan 15]. Available from: http://hdl.handle.net/2104/5115.

Council of Science Editors:

Wu R. Gravitational collapse and formation of black holes in the Brans-Dicke theory of gravity with (2+1) dimensions. [Masters Thesis]. Baylor University; 2008. Available from: http://hdl.handle.net/2104/5115

University of Cambridge

20. Blythe, Thomas. Taking magnetic resonance into industrial applications.

Degree: PhD, 2018, University of Cambridge

URL: https://doi.org/10.17863/CAM.20950 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.744605

► Magnetic resonance (MR) is a highly versatile technique with great potential for use in industrial applications; from the in situ study of unit operations to… (more)

▼ Magnetic resonance (MR) is a highly versatile technique with great potential for use in industrial applications; from the in situ study of unit operations to the optimisation of product properties. This thesis, concerned with the latter, is divided into two parts. Firstly, dynamic MR is applied to characterise the flow behaviour, or rheology, of process fluids. Such characterisation is typically performed using conventional rheometry methods operating offline, with an online, or inline, method sought for process control and optimisation. Until recently, MR was an unlikely choice for this application due to the requirement of high-field MR hardware. However, recent developments in low-field MR hardware mean that the potential of MR in such applications can now be realised. Since the implementation of MR flow imaging is challenging on low-field MR hardware, two new approaches to MR rheometry are described using pulsed field gradient (PFG) MR. A cumulant analysis of the PFG MR signal is first used to characterise the rheology of model power-law fluids, namely xanthan gum-in-water solutions, accurate to within 5% of conventional rheometry, the data being acquired in only 6% of the time required when using MR flow imaging. The second approach utilises a Bayesian analysis of the PFG MR signal to characterise the rheology of model Herschel – Bulkley fluids, namely Carbopol 940-in-water solutions; data are acquired in only 12% of the time required for analysis using MR flow imaging. The suitability of the Bayesian MR approach to study process fluids is demonstrated through experimental study on an alumina-in-acetic acid slurry used by Johnson Matthey. Secondly, MR imaging is used to provide insights into the origins and mechanisms of colloidal gel collapse. Many industrial products are colloidal gels, a space-spanning network of attractive particles with a yield stress. Colloidal gels are, however, known to undergo gravitational collapse after a latency period, thus limiting the shelf-life of products. This remains poorly understood, with a more detailed understanding of both fundamental interest and practical importance. To this end, MR imaging is applied offline to investigate the phase behaviour of colloidal gels. In particular, a comparison of the simulated and experimental phase diagrams suggests gravitational gel collapse to be gravity-driven. Furthermore, measurement of the colloid volume fraction using MR imaging indicates the formation of clusters of colloids at the top of the samples. Whether such clusters initiate gravitational gel collapse is yield stress-dependent; the gravitational stress exerted by a cluster must be sufficient to yield the colloidal gel.

Subjects/Keywords: 538; magnetic resonance; pulsed field gradient; imaging; industrial applications; rheology; non-Newtonian fluids; colloidal gels; gravitational collapse

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Blythe, T. (2018). Taking magnetic resonance into industrial applications. (Doctoral Dissertation). University of Cambridge. Retrieved from https://doi.org/10.17863/CAM.20950 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.744605

Chicago Manual of Style (16^th Edition):

Blythe, Thomas. “Taking magnetic resonance into industrial applications.” 2018. Doctoral Dissertation, University of Cambridge. Accessed January 15, 2021. https://doi.org/10.17863/CAM.20950 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.744605.

MLA Handbook (7^th Edition):

Blythe, Thomas. “Taking magnetic resonance into industrial applications.” 2018. Web. 15 Jan 2021.

Vancouver:

Blythe T. Taking magnetic resonance into industrial applications. [Internet] [Doctoral dissertation]. University of Cambridge; 2018. [cited 2021 Jan 15]. Available from: https://doi.org/10.17863/CAM.20950 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.744605.

Council of Science Editors:

Blythe T. Taking magnetic resonance into industrial applications. [Doctoral Dissertation]. University of Cambridge; 2018. Available from: https://doi.org/10.17863/CAM.20950 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.744605

Brigham Young University

21. Skinfill, Craig Ernest. Electromagnetism in Gravitational Collapse.

Degree: MS, 2005, Brigham Young University

URL: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=1348&context=etd

► A numerical approach to including electromagnetism with general relativity is developed using GRAXI as a starting point. We develop a mathematical model describing electromagnetism coupled… (more)

Subjects/Keywords: electromagnetism; gravitational; collapse; numerical; relativity; Astrophysics and Astronomy; Physics

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Skinfill, C. E. (2005). Electromagnetism in Gravitational Collapse. (Masters Thesis). Brigham Young University. Retrieved from https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=1348&context=etd

Chicago Manual of Style (16^th Edition):

Skinfill, Craig Ernest. “Electromagnetism in Gravitational Collapse.” 2005. Masters Thesis, Brigham Young University. Accessed January 15, 2021. https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=1348&context=etd.

MLA Handbook (7^th Edition):

Skinfill, Craig Ernest. “Electromagnetism in Gravitational Collapse.” 2005. Web. 15 Jan 2021.

Vancouver:

Skinfill CE. Electromagnetism in Gravitational Collapse. [Internet] [Masters thesis]. Brigham Young University; 2005. [cited 2021 Jan 15]. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=1348&context=etd.

Council of Science Editors:

Skinfill CE. Electromagnetism in Gravitational Collapse. [Masters Thesis]. Brigham Young University; 2005. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=1348&context=etd

University of Cambridge

22. Blythe, Thomas. Taking Magnetic Resonance into Industrial Applications.

Degree: PhD, 2018, University of Cambridge

URL: https://www.repository.cam.ac.uk/handle/1810/273874

► Magnetic resonance (MR) is a highly versatile technique with great potential for use in industrial applications; from the in situ study of unit operations to… (more)

▼ Magnetic resonance (MR) is a highly versatile technique with great potential for use in industrial applications; from the in situ study of unit operations to the optimisation of product properties. This thesis, concerned with the latter, is divided into two parts. Firstly, dynamic MR is applied to characterise the flow behaviour, or rheology, of process fluids. Such characterisation is typically performed using conventional rheometry methods operating offline, with an online, or inline, method sought for process control and optimisation. Until recently, MR was an unlikely choice for this application due to the requirement of high-field MR hardware. However, recent developments in low-field MR hardware mean that the potential of MR in such applications can now be realised. Since the implementation of MR flow imaging is challenging on low-field MR hardware, two new approaches to MR rheometry are described using pulsed field gradient (PFG) MR. A cumulant analysis of the PFG MR signal is first used to characterise the rheology of model power-law fluids, namely xanthan gum-in-water solutions, accurate to within 5% of conventional rheometry, the data being acquired in only 6% of the time required when using MR flow imaging. The second approach utilises a Bayesian analysis of the PFG MR signal to characterise the rheology of model Herschel – Bulkley fluids, namely Carbopol 940-in-water solutions; data are acquired in only 12% of the time required for analysis using MR flow imaging. The suitability of the Bayesian MR approach to study process fluids is demonstrated through experimental study on an alumina-in-acetic acid slurry used by Johnson Matthey. Secondly, MR imaging is used to provide insights into the origins and mechanisms of colloidal gel collapse. Many industrial products are colloidal gels, a space-spanning network of attractive particles with a yield stress. Colloidal gels are, however, known to undergo gravitational collapse after a latency period, thus limiting the shelf-life of products. This remains poorly understood, with a more detailed understanding of both fundamental interest and practical importance. To this end, MR imaging is applied offline to investigate the phase behaviour of colloidal gels. In particular, a comparison of the simulated and experimental phase diagrams suggests gravitational gel collapse to be gravity-driven. Furthermore, measurement of the colloid volume fraction using MR imaging indicates the formation of clusters of colloids at the top of the samples. Whether such clusters initiate gravitational gel collapse is yield stress-dependent; the gravitational stress exerted by a cluster must be sufficient to yield the colloidal gel.

Subjects/Keywords: magnetic resonance; pulsed field gradient; imaging; industrial applications; rheology; non-Newtonian fluids; colloidal gels; gravitational collapse

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Blythe, T. (2018). Taking Magnetic Resonance into Industrial Applications. (Doctoral Dissertation). University of Cambridge. Retrieved from https://www.repository.cam.ac.uk/handle/1810/273874

Chicago Manual of Style (16^th Edition):

Blythe, Thomas. “Taking Magnetic Resonance into Industrial Applications.” 2018. Doctoral Dissertation, University of Cambridge. Accessed January 15, 2021. https://www.repository.cam.ac.uk/handle/1810/273874.

MLA Handbook (7^th Edition):

Blythe, Thomas. “Taking Magnetic Resonance into Industrial Applications.” 2018. Web. 15 Jan 2021.

Vancouver:

Blythe T. Taking Magnetic Resonance into Industrial Applications. [Internet] [Doctoral dissertation]. University of Cambridge; 2018. [cited 2021 Jan 15]. Available from: https://www.repository.cam.ac.uk/handle/1810/273874.

Council of Science Editors:

Blythe T. Taking Magnetic Resonance into Industrial Applications. [Doctoral Dissertation]. University of Cambridge; 2018. Available from: https://www.repository.cam.ac.uk/handle/1810/273874

University of Texas – Austin

23. Smarr, Larry L. The structure of general relativity with a numerical illustration : the collision of two black holes.

Degree: PhD, Physics, 1975, University of Texas – Austin

URL: http://dx.doi.org/10.26153/tsw/27

► The splitting of spacetime into space and time is analyzed by abstract methods, coordinate methods, and numerical computer methods. General relativity is assumed to be… (more)

Subjects/Keywords: General relativity (Physics); Gravitational collapse; Space and time

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Smarr, L. L. (1975). The structure of general relativity with a numerical illustration : the collision of two black holes. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://dx.doi.org/10.26153/tsw/27

Chicago Manual of Style (16^th Edition):

Smarr, Larry L. “The structure of general relativity with a numerical illustration : the collision of two black holes.” 1975. Doctoral Dissertation, University of Texas – Austin. Accessed January 15, 2021. http://dx.doi.org/10.26153/tsw/27.

MLA Handbook (7^th Edition):

Smarr, Larry L. “The structure of general relativity with a numerical illustration : the collision of two black holes.” 1975. Web. 15 Jan 2021.

Vancouver:

Smarr LL. The structure of general relativity with a numerical illustration : the collision of two black holes. [Internet] [Doctoral dissertation]. University of Texas – Austin; 1975. [cited 2021 Jan 15]. Available from: http://dx.doi.org/10.26153/tsw/27.

Council of Science Editors:

Smarr LL. The structure of general relativity with a numerical illustration : the collision of two black holes. [Doctoral Dissertation]. University of Texas – Austin; 1975. Available from: http://dx.doi.org/10.26153/tsw/27

Simon Fraser University

24. Aruliah, Dhavide Arjunan. T-domains, exotic black holes and gravitational collapse in a Tolman-Bondi space-time.

Degree: 1996, Simon Fraser University

URL: http://summit.sfu.ca/item/7093

Subjects/Keywords: Black holes (Astronomy); Gravitational collapse.; General relativity (Physics)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Aruliah, D. A. (1996). T-domains, exotic black holes and gravitational collapse in a Tolman-Bondi space-time. (Thesis). Simon Fraser University. Retrieved from http://summit.sfu.ca/item/7093

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Aruliah, Dhavide Arjunan. “T-domains, exotic black holes and gravitational collapse in a Tolman-Bondi space-time.” 1996. Thesis, Simon Fraser University. Accessed January 15, 2021. http://summit.sfu.ca/item/7093.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Aruliah, Dhavide Arjunan. “T-domains, exotic black holes and gravitational collapse in a Tolman-Bondi space-time.” 1996. Web. 15 Jan 2021.

Vancouver:

Aruliah DA. T-domains, exotic black holes and gravitational collapse in a Tolman-Bondi space-time. [Internet] [Thesis]. Simon Fraser University; 1996. [cited 2021 Jan 15]. Available from: http://summit.sfu.ca/item/7093.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Aruliah DA. T-domains, exotic black holes and gravitational collapse in a Tolman-Bondi space-time. [Thesis]. Simon Fraser University; 1996. Available from: http://summit.sfu.ca/item/7093

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

25. Perico, Eder Leonardo Duarte. Efeitos de um vácuo dinâmico na evolução cósmica e no colapso gravitacional.

Degree: PhD, Física, 2015, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/43/43134/tde-28042015-182504/ ;

► As observações astronômicas dos últimos 15 anos revelaram que o universo atualmente está expandindo aceleradamente. No contexto da relatividade geral se acredita que a energia… (more)

▼ As observações astronômicas dos últimos 15 anos revelaram que o universo atualmente está expandindo aceleradamente. No contexto da relatividade geral se acredita que a energia escura, cujo melhor candidato é a densidade do vácuo (\Λ/8\π G), é o agente responsável por este estado acelerado. No entanto, o termo \Λ tem duas sérias dificuldades: o problema da constante cosmológica e o problema da coincidência. Com o objetivo de aliviar o problema da constante cosmológica, muitos modelos adotam um termo \Λ dinâmico, permitindo seu decrescimento ao longo de toda a história cósmica. Neste tipo de modelo, a equação de conservação do tensor momento energia total exige uma troca de energia entre a densidade do vácuo e as outras componentes energéticas do universo; o que também alivia o problema da coincidência. Neste trabalho discutimos diferentes consequências de um vácuo dinâmico no âmbito cosmológico e no processo de colapso gravitacional. Em particular, analisamos o caso em que a densidade do vácuo possui uma dinâmica não trivial com a escala de energia típica do universo, que depende monotonamente do parâmetro de Hubble, decrescendo ao longo de toda a história cósmica. Nos referiremos a este modelo como modelo deflacionário. Nesse contexto, utilizando os primeiros termos da expansão para a densidade do vácuo, sugerida pela teoria do grupo de renormalização em espaço-tempos curvos, propomos um novo cenário cosmológico baseado numa densidade do vácuo dinâmica. O cenário proposto é completo no sentido de que o mesmo vácuo é responsável pelas duas fases aceleradas do universo, conectadas por uma fase de radiação e um estágio de domínio da matéria. Neste cenário o universo plano é não singular, iniciando sua evolução a partir de um estágio do tipo de Sitter e, portanto, toda a história cósmica ocorre entre duas fases de Sitter limites. Este modelo não apresenta o problema de horizonte, e nele a nucleossíntese cosmológica ocorre como no modelo de Friedmann, e embora este modelo seja muito próximo do modelo \ΛCDM, o grande acúmulo de observações no estágio recente do universo permitirão que este poda ser testado. Adicionalmente, mostraremos que generalizações do modelo deflacionário incluindo curvatura espacial apresentam propriedades e vantagens similares. Usando observações de H(z), da luminosidade de supernovas tipo Ia, da função de crescimento linear das perturbações escalares, e da posição do pico das oscilações acústicas de bárions conseguimos vincular um dos parâmetros do modelo. Por outro lado, analisando a física do universo primordial, assumindo um vácuo não perturbado, conseguimos limitar um segundo parâmetro fazendo uso do índice espectral das perturbações escalares. Com o objetivo de fazer uma análise mais completa do modelo no âmbito cosmológico, analisamos também as possíveis restrições oriundas da validade da segunda lei da termodinâmica em sua forma generalizada (GSLT). Para isto investigamos a evolução tanto da entropia associada ao horizonte aparente do universo,… Advisors/Committee Members: Lima, José Ademir Sales de.

Subjects/Keywords: Coincidence problem; Colapso gravitacional; Cosmologias com vácuo dinâmico; Cosmological constant problem; Cosmologies with a dynamical vacuum; Gravitational collapse; Inflação; Inflation; Problema da coincidência; Problema da constante cosmológica

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Perico, E. L. D. (2015). Efeitos de um vácuo dinâmico na evolução cósmica e no colapso gravitacional. (Doctoral Dissertation). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/43/43134/tde-28042015-182504/ ;

Chicago Manual of Style (16^th Edition):

Perico, Eder Leonardo Duarte. “Efeitos de um vácuo dinâmico na evolução cósmica e no colapso gravitacional.” 2015. Doctoral Dissertation, University of São Paulo. Accessed January 15, 2021. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-28042015-182504/ ;.

MLA Handbook (7^th Edition):

Perico, Eder Leonardo Duarte. “Efeitos de um vácuo dinâmico na evolução cósmica e no colapso gravitacional.” 2015. Web. 15 Jan 2021.

Vancouver:

Perico ELD. Efeitos de um vácuo dinâmico na evolução cósmica e no colapso gravitacional. [Internet] [Doctoral dissertation]. University of São Paulo; 2015. [cited 2021 Jan 15]. Available from: http://www.teses.usp.br/teses/disponiveis/43/43134/tde-28042015-182504/ ;.

Council of Science Editors:

Perico ELD. Efeitos de um vácuo dinâmico na evolução cósmica e no colapso gravitacional. [Doctoral Dissertation]. University of São Paulo; 2015. Available from: http://www.teses.usp.br/teses/disponiveis/43/43134/tde-28042015-182504/ ;

26. José Domingo Arbañil Vela. Sistemas eletricamente carregados em relatividade geral: equilíbrio e colapso.

Degree: 2009, Universidade Federal do ABC

URL: http://tede.ufabc.edu.br/tde_busca/arquivo.php?codArquivo=180

►

No presente trabalho estuda-se o equilíbrio hidrostático e o colapso gravitacional de estrelas com carga elétrica para três tipos diferentes de simetria: esférica, plana e… (more)

▼

No presente trabalho estuda-se o equilíbrio hidrostático e o colapso gravitacional de estrelas com carga elétrica para três tipos diferentes de simetria: esférica, plana e hiperbólica, em um espaço-tempo d-dimensional. Inicialmente revisam-se brevemente os conceitos fundamentais da Relatividade Geral e apresentam-se as equaçõoes principais a serem usadas. Em seguida demonstra-se o teorema de Birkhoff em uma forma generalizada, incluindo carga elétrica e constante cosmológica, e para as simetrias esférica, plana e hiperbólica, em espaço-tempo em d-dimensões. Com este estudo se obtém a forma geral da métrica na região do espaço-tempo não ocupada por matéria eletricamente carregada. A partir disso, a equação de de Tolman-Oppenheimer-Volkoff (TOV) para um fluido perfeito carregado é analisada para duas equações de estado politrópicas diferentes. Em ambos casos, a equação TOV é solucionada numericamente mediante o método de Runge-Kutta de quarta ordem, considerando-se espaços-tempos quadri- e penta-dimensionais. Uma breve análise do colapso gravitacional de uma estrela com carga elétrica em um espaço-tempo d-dimensional é apresentada. Esta análise inclui uma revisão das condições de junção de Israel-Darmois, onde obtém-se explicitamente o sistema de equações que descrevem o colapso gravitacional para uma estrela com carga elétrica, para assimetrias esférica, plana e hiperbólica, em um espaço-tempo em d-dimensões. Nesse estudo, encontra-se uma equação que informa como se dá a evolução completa da superfície da estrela e indica como será o estágio final da mesma.

We study the hydrostatic equilibrium and the gravitational collapse of charged stars for three dierent kind of symmetries, namely, spherical, planar and hyperbolic symmetries in d-dimensional spacetimes. Firstly we briefly review the basic concepts and equations used in the development of the work, such as, the Einstein-Maxwell equations, the energy-momentum tensor for a charged perfect fluid and the conservation equations. Then we generalize the Birkhoff theorem to d-dimensional spacetimes with spherical, planar, and hyperbolic symmetries, including electric charge and cosmological constant. This first study is important because with this we obtain the general form of the exterior metric. The equation of stellar equilibrium, which is also known as the Tolman-Oppenheimer-Volkoff (TOV) equation, for a charged perfect fluid in d-dimensional spacetimes with the symmetries mentioned above, is found. The TOV equation is then analyzed for two dierent equations of state of polytropic type. In both of the cases, the TOV equation is numerically solved by means of a fourth-order Runge-Kutta method, for four- and five-dimensional spacetimes. In this analysis it is considered that the charge density is proportional to the mass density. Finally we present an analytical study of the gravitational collapse of a charged fluid distribution in d-dimensional spacetimes with spherical, hyperbolic and planar symmetries. By using the Israel-Darmois junction conditions, the…

Advisors/Committee Members: Nelson Pinto Neto, Vilson Tonin Zanchin, Patricio Anibal Letelier Sotomayor.

Subjects/Keywords: RELATIVIDADE E GRAVITACAO; Relatividade Geral; altas dimensões; teorema de Birkhoff; estabilidade estelar; colapso gravitacional; General Relativity; higher dimensions; Birkhoff theorem; stellar stability; gravitational collapse

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Vela, J. D. A. (2009). Sistemas eletricamente carregados em relatividade geral: equilíbrio e colapso. (Thesis). Universidade Federal do ABC. Retrieved from http://tede.ufabc.edu.br/tde_busca/arquivo.php?codArquivo=180

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Vela, José Domingo Arbañil. “Sistemas eletricamente carregados em relatividade geral: equilíbrio e colapso.” 2009. Thesis, Universidade Federal do ABC. Accessed January 15, 2021. http://tede.ufabc.edu.br/tde_busca/arquivo.php?codArquivo=180.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Vela, José Domingo Arbañil. “Sistemas eletricamente carregados em relatividade geral: equilíbrio e colapso.” 2009. Web. 15 Jan 2021.

Vancouver:

Vela JDA. Sistemas eletricamente carregados em relatividade geral: equilíbrio e colapso. [Internet] [Thesis]. Universidade Federal do ABC; 2009. [cited 2021 Jan 15]. Available from: http://tede.ufabc.edu.br/tde_busca/arquivo.php?codArquivo=180.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Vela JDA. Sistemas eletricamente carregados em relatividade geral: equilíbrio e colapso. [Thesis]. Universidade Federal do ABC; 2009. Available from: http://tede.ufabc.edu.br/tde_busca/arquivo.php?codArquivo=180

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade do Estado do Rio de Janeiro

27. Marina Reis Martins. Gravidade (2+1)-dimensional: um laboratório teórico para alguns dos desafios da relatividade geral .

Degree: PhD, 2009, Universidade do Estado do Rio de Janeiro

URL: http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=1473 ;

► O fenômeno do colapso gravitacional e a estrutura de estrelas relativísticas são de grande importância em astrofísica desde a formulação da relatividade geral. Alguns trabalhos… (more)

▼ O fenômeno do colapso gravitacional e a estrutura de estrelas relativísticas são de grande importância em astrofísica desde a formulação da relatividade geral. Alguns trabalhos mais recentes revelam avanços importantes em nosso entendimento da formação de estruturas como buracos negros e singularidades nuas e do comportamento de fluidos exóticos tais como matéria e energia escura, incluindo aqui os fluidos fantasmas. A complexidade do estudo do colapso gravitacional está relacionada à existência de poucas soluções analíticas disponíveis para este fim. Recentemente, soluções auto-similares das equações de campo de Einstein têm atraído grande atenção, não somente pela possibilidade de serem estudadas analiticamente, simplificando o problema, mas também por sua relevância em astrofísica. Neste trabalho, estudamos o colapso gravitacional do fluido anisotrópico com auto-similaridade do segundo e primeiro tipos em espaços-tempos (2 + 1)-dimensionais, com simetria circular. Impondo as equações de estado pr = 0 e pθ = ωρ, onde ρ determina a densidade de energia e pr, pθ as pressões nas direções radial e tangencial do fluido, mostramos que, para soluções com auto-similaridade do segundo tipo, há duas distintas famílias. Para uma delas, as únicas soluções são as que representam fluido de poeira. Todas as soluções para as equações de campo de Einstein são encontradas e suas propriedades locais e globais são estudadas em detalhes. Algumas delas podem ser interpretadas como um processo de colapso gravitacional, em que singularidades nuas e buracos negros são formados. Para a outra família de soluções, temos um modelo cosmológico, com expansão acelerada, que começa em uma singularidade inicial (t = 0), com todas as condições de energia satisfeitas. Nosso propósito foi investigar o papel da não-homogeneidade na aceleração do fluido. Na intenção de estudar as soluções com auto-similaridade do primeiro tipo, mostramos que existe uma solução que representa um processo de colapso gravitacional, resultando em uma estrutura final de buraco negro ou singularidade nua, que podem ser constituídos de um fluido bem comportado ou fantasma. Advisors/Committee Members: Roberto Chan, James Ewan Faskin Skea, Nazira Abache Tomimura, Santiago Esteban Perez Bergliaffa, Jaime Fernando Villas da Rocha, Carlos Frederico Charret Brandt, Maria de Fátima Alves da Silva.

Subjects/Keywords: Energia fantasma; Não-homogeneidade; Singularidade Nua; Buraco Negro; Colapso Gravitacional; Inhomogeneity; Phantom energy; Naked singularity; Black hole; Collapse gravitational; RELATIVIDADE E GRAVITACAO

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Martins, M. R. (2009). Gravidade (2+1)-dimensional: um laboratório teórico para alguns dos desafios da relatividade geral . (Doctoral Dissertation). Universidade do Estado do Rio de Janeiro. Retrieved from http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=1473 ;

Chicago Manual of Style (16^th Edition):

Martins, Marina Reis. “Gravidade (2+1)-dimensional: um laboratório teórico para alguns dos desafios da relatividade geral .” 2009. Doctoral Dissertation, Universidade do Estado do Rio de Janeiro. Accessed January 15, 2021. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=1473 ;.

MLA Handbook (7^th Edition):

Martins, Marina Reis. “Gravidade (2+1)-dimensional: um laboratório teórico para alguns dos desafios da relatividade geral .” 2009. Web. 15 Jan 2021.

Vancouver:

Martins MR. Gravidade (2+1)-dimensional: um laboratório teórico para alguns dos desafios da relatividade geral . [Internet] [Doctoral dissertation]. Universidade do Estado do Rio de Janeiro; 2009. [cited 2021 Jan 15]. Available from: http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=1473 ;.

Council of Science Editors:

Martins MR. Gravidade (2+1)-dimensional: um laboratório teórico para alguns dos desafios da relatividade geral . [Doctoral Dissertation]. Universidade do Estado do Rio de Janeiro; 2009. Available from: http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=1473 ;

Brigham Young University

28. Christenson, Michael P. Black Spaghetti: A Numerical Model of Gravitational Collapse in 4 + 1 Spacetime.

Degree: MS, 2005, Brigham Young University

URL: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=1536&context=etd

► We investigate spherically-symmetric gravitational collapse in the presence of a single "large" extra dimension through the use of analytical and numerical techniques. This has… (more)

Subjects/Keywords: black string; gravitational collapse; extra dimension; Astrophysics and Astronomy; Physics

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Christenson, M. P. (2005). Black Spaghetti: A Numerical Model of Gravitational Collapse in 4 + 1 Spacetime. (Masters Thesis). Brigham Young University. Retrieved from https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=1536&context=etd

Chicago Manual of Style (16^th Edition):

Christenson, Michael P. “Black Spaghetti: A Numerical Model of Gravitational Collapse in 4 + 1 Spacetime.” 2005. Masters Thesis, Brigham Young University. Accessed January 15, 2021. https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=1536&context=etd.

MLA Handbook (7^th Edition):

Christenson, Michael P. “Black Spaghetti: A Numerical Model of Gravitational Collapse in 4 + 1 Spacetime.” 2005. Web. 15 Jan 2021.

Vancouver:

Christenson MP. Black Spaghetti: A Numerical Model of Gravitational Collapse in 4 + 1 Spacetime. [Internet] [Masters thesis]. Brigham Young University; 2005. [cited 2021 Jan 15]. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=1536&context=etd.

Council of Science Editors:

Christenson MP. Black Spaghetti: A Numerical Model of Gravitational Collapse in 4 + 1 Spacetime. [Masters Thesis]. Brigham Young University; 2005. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=1536&context=etd

Baylor University

29. Zhao, Lei. Gravitational collapse of spherical clouds and formation of black holes in the background of dark energy.

Degree: MS, Physics., 2007, Baylor University

URL: http://hdl.handle.net/2104/4991

► In this thesis, I first review the fundamentals of Einstein's theory of gravity in four-dimensional spacetimes, and then develop the general formulas of thin shells… (more)

Subjects/Keywords: Gravitational collapse – Mathematical models.; Black holes (Astronomy) – Mathematical models.; Celestial mechanics – Mathematical models.

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Zhao, L. (2007). Gravitational collapse of spherical clouds and formation of black holes in the background of dark energy. (Masters Thesis). Baylor University. Retrieved from http://hdl.handle.net/2104/4991

Chicago Manual of Style (16^th Edition):

Zhao, Lei. “Gravitational collapse of spherical clouds and formation of black holes in the background of dark energy.” 2007. Masters Thesis, Baylor University. Accessed January 15, 2021. http://hdl.handle.net/2104/4991.

MLA Handbook (7^th Edition):

Zhao, Lei. “Gravitational collapse of spherical clouds and formation of black holes in the background of dark energy.” 2007. Web. 15 Jan 2021.

Vancouver:

Zhao L. Gravitational collapse of spherical clouds and formation of black holes in the background of dark energy. [Internet] [Masters thesis]. Baylor University; 2007. [cited 2021 Jan 15]. Available from: http://hdl.handle.net/2104/4991.

Council of Science Editors:

Zhao L. Gravitational collapse of spherical clouds and formation of black holes in the background of dark energy. [Masters Thesis]. Baylor University; 2007. Available from: http://hdl.handle.net/2104/4991

30. An, Xinliang. Formation of Trapped Surfaces in General Relativity .

Degree: PhD, 2014, Princeton University

URL: http://arks.princeton.edu/ark:/88435/dsp01m900nt56d

► In this thesis we present two results regarding the formation of trapped surfaces in general relativity. The first is a simplified approach to Christodoulou's breakthrough… (more)

Subjects/Keywords: Einstein's Equation; Gravitational Collapse; Short Pulse Method; Trapped Surface

…blow-up rates close to the center of gravitational collapse. In [2], together with… …to reach the region u ≈ bδa 2 . This is very close to the center of gravitational collapse… …regions of spacetime where the gravitational field is so strong that even light cannot escape… …infinity). One defines and studies gravitational waves from past null infinity by… …trapped surface of radius c. The gravitational radiation needs to go sufficiently far inside…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

An, X. (2014). Formation of Trapped Surfaces in General Relativity . (Doctoral Dissertation). Princeton University. Retrieved from http://arks.princeton.edu/ark:/88435/dsp01m900nt56d

Chicago Manual of Style (16^th Edition):

An, Xinliang. “Formation of Trapped Surfaces in General Relativity .” 2014. Doctoral Dissertation, Princeton University. Accessed January 15, 2021. http://arks.princeton.edu/ark:/88435/dsp01m900nt56d.

MLA Handbook (7^th Edition):

An, Xinliang. “Formation of Trapped Surfaces in General Relativity .” 2014. Web. 15 Jan 2021.

Vancouver:

An X. Formation of Trapped Surfaces in General Relativity . [Internet] [Doctoral dissertation]. Princeton University; 2014. [cited 2021 Jan 15]. Available from: http://arks.princeton.edu/ark:/88435/dsp01m900nt56d.

Council of Science Editors:

An X. Formation of Trapped Surfaces in General Relativity . [Doctoral Dissertation]. Princeton University; 2014. Available from: http://arks.princeton.edu/ark:/88435/dsp01m900nt56d

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