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You searched for +publisher:"Washington University in St. Louis" +contributor:("Wai-Mo Suen"). Showing records 1 – 2 of 2 total matches.

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Washington University in St. Louis

1. Wan, Mew-Bing. Properties of Neutron Star Critical Collapses.

Degree: PhD, Physics, 2009, Washington University in St. Louis

Critical phenomena in gravitational collapse opened a new mathematical vista into the theory of general relativity and may ultimately entail fundamental physical implication in the astrophysical realm, especially in gravitational collapse scenarios. However, at present, the dynamics of critical phenomena in realistic astrophysical gravitational collapse scenarios are still largely unknown. My thesis seeks to understand the properties of the neutron star critical solution, understand the properties of the threshold in the solution space of the Einstein field equations between the black hole and a neutron star phases, and clarify the implication these results on realistic astrophysical scenarios. We develop a new set of neutron star-like initial data to establish the universality of the neutron star critical solution and analyze the structure of neutron star and neutron star-like critical collapses via the framework of phase spaces. We also study the different time scales involved in the neutron star critical solution and analyze the properties of the critical index via comparisons between neutron star and neutron star-like initial data. Finally, we explore the boundary of the attraction basin of the neutron star critical solution and its transition to a known set of non-critical fixed points. Advisors/Committee Members: Wai-Mo Suen.

Subjects/Keywords: Physics, Theory; Physics, Astronomy and Astrophysics

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APA (6th Edition):

Wan, M. (2009). Properties of Neutron Star Critical Collapses. (Doctoral Dissertation). Washington University in St. Louis. Retrieved from https://openscholarship.wustl.edu/etd/366

Chicago Manual of Style (16th Edition):

Wan, Mew-Bing. “Properties of Neutron Star Critical Collapses.” 2009. Doctoral Dissertation, Washington University in St. Louis. Accessed April 08, 2020. https://openscholarship.wustl.edu/etd/366.

MLA Handbook (7th Edition):

Wan, Mew-Bing. “Properties of Neutron Star Critical Collapses.” 2009. Web. 08 Apr 2020.

Vancouver:

Wan M. Properties of Neutron Star Critical Collapses. [Internet] [Doctoral dissertation]. Washington University in St. Louis; 2009. [cited 2020 Apr 08]. Available from: https://openscholarship.wustl.edu/etd/366.

Council of Science Editors:

Wan M. Properties of Neutron Star Critical Collapses. [Doctoral Dissertation]. Washington University in St. Louis; 2009. Available from: https://openscholarship.wustl.edu/etd/366


Washington University in St. Louis

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

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

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 kinetic energy described by an equation of state: EOS) commonly used in describing neutron star matter may undergo critical collapses. To the best of our knowledge, this is the first study showing that critical collapses can occur without postulating an exotic EOS. We further showed that the critical collapses can occur due to an adiabatic change of the EOS, without fine tuning of the initial conditions. This opens the possibility that a neutron-star-like compact object with substantial kinetic energy, e.g. one newly formed in a supernova or in a binary coalescence, may undergo a critical collapse in processes which change the EOS, such as cooling. We investigated the properties of the critical solutions of this system. We found, surprisingly, that there are branches of critical solutions, and a complicated phase diagram not been seen in other critical collapse studies. The numerical simulations were carried out based on the full set of the Einstein equations coupled to the general relativistic hydrodynamic equations. The code we constructed, GRAstro-2D, assumed axisymmetry to achieve high enough resolution needed for the study. Advisors/Committee Members: Wai-Mo Suen.

Subjects/Keywords: Physics; Critical Phenomena; Gravitational Collapse

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

APA (6th 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 (16th Edition):

Jin, Kejian. “Critical Phenomena in Gravitational Collapses of Neutron Star Systems.” 2011. Doctoral Dissertation, Washington University in St. Louis. Accessed April 08, 2020. https://openscholarship.wustl.edu/etd/594.

MLA Handbook (7th Edition):

Jin, Kejian. “Critical Phenomena in Gravitational Collapses of Neutron Star Systems.” 2011. Web. 08 Apr 2020.

Vancouver:

Jin K. Critical Phenomena in Gravitational Collapses of Neutron Star Systems. [Internet] [Doctoral dissertation]. Washington University in St. Louis; 2011. [cited 2020 Apr 08]. 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

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