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You searched for +publisher:"Virginia Tech" +contributor:("Horiuchi, Shunsaku"). Showing records 1 – 2 of 2 total matches.

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Virginia Tech

1. Murphy, Matthew Douglas. Inclusive and exclusive electron scattering data analysis from Jefferson Lab experiment E12-14-012.

Degree: PhD, Physics, 2021, Virginia Tech

Since the first observations of neutrino oscillation, neutrino experiments have come a long way toward precise measurements of the neutrino oscillation parameters, but some of the properties of neutrinos still remain uncertain. The next generation of neutrino oscillation experiments, including the Deep Underground Neutrino Experiment (DUNE), will be using the Liquid Argon Time Projection Chambers (LArTPCs) with natural argon as the neutrino target material. A precise model of the neutrino cross section on argon does not exist, which will reduce the opportunity for DUNE to measure the neutrino properties with high precision. The E12-14-012 experiment at Jefferson Lab seeks to help remedy this via electron scattering measurements on argon and titanium targets. The experiment collected both inclusive (e,e') and exclusive (e,e'p) data.The goal of this experiment is measure the electron-nucleus interactions and provide a nuclear model for electron and neutrino interactions. This Ph.D. thesis collects several papers which present the results from the Jefferson lab E12-14-012 experiment. Advisors/Committee Members: Mariani, Camillo (committeechair), Horiuchi, Shunsaku (committee member), Piilonen, Leo E. (committee member), Huber, Patrick (committee member).

Subjects/Keywords: electron scattering; neutrino; JLab

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

APA (6th Edition):

Murphy, M. D. (2021). Inclusive and exclusive electron scattering data analysis from Jefferson Lab experiment E12-14-012. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/101964

Chicago Manual of Style (16th Edition):

Murphy, Matthew Douglas. “Inclusive and exclusive electron scattering data analysis from Jefferson Lab experiment E12-14-012.” 2021. Doctoral Dissertation, Virginia Tech. Accessed April 18, 2021. http://hdl.handle.net/10919/101964.

MLA Handbook (7th Edition):

Murphy, Matthew Douglas. “Inclusive and exclusive electron scattering data analysis from Jefferson Lab experiment E12-14-012.” 2021. Web. 18 Apr 2021.

Vancouver:

Murphy MD. Inclusive and exclusive electron scattering data analysis from Jefferson Lab experiment E12-14-012. [Internet] [Doctoral dissertation]. Virginia Tech; 2021. [cited 2021 Apr 18]. Available from: http://hdl.handle.net/10919/101964.

Council of Science Editors:

Murphy MD. Inclusive and exclusive electron scattering data analysis from Jefferson Lab experiment E12-14-012. [Doctoral Dissertation]. Virginia Tech; 2021. Available from: http://hdl.handle.net/10919/101964


Virginia Tech

2. Xu, Xinfeng. How Do Quasars Impact Their Host Galaxies? From the Studies of Quasar Outflows in Absorption and Emission.

Degree: PhD, Physics, 2020, Virginia Tech

Super massive black holes (SMBHs) are believed to exist in the center of almost all massive galaxies, where the brightest accreting ones are named ``quasars''. ``Quasar-mode feedback'' occurs when momentum and energy from the environment of accreting SMBHs couple to the host galaxy. One mechanism for such a coupling is by high-velocity (up to sim 0.2c) quasar-driven ionized outflows, appearing as blue-shifted absorption and emission lines in quasar spectra. Given enough energy and momentum, these outflows are capable of affecting the evolution of their host galaxies. Such quasar outflows are invoked to explain a variety of observations, e.g., the chemical enrichment of the intergalactic medium (IGM), the shape of the observed quasar luminosity function, and the self-regulation of the growth of the SMBHs. In this dissertation, I focus on studying the emission and absorption outflows observed in quasars spectra, collected with the largest telescopes and most powerful instruments in the world. (1). By conducting large broad absorption line (BAL) quasar surveys in both Sloan Digital Sky Survey and Very Large Telescopes (VLT), we determined various physics properties of quasar absorption outflows, e.g., the electron number density (ne), the distance of outflows to the central quasar (R), and the kinetic energy carried by the outflow (dot{E}k). We demonstrated that half of the typical BAL outflows are situated at R > 100 pc, i.e., having the potential to affect the host galaxies. (2). Our group carried out a Hubble Space Telescope program (PI: Arav) for studying the outflows in the Extreme-UV, collaborating with Dr. Gerard Kriss from Space Telescope Science Institute (STScI). We developed a novel method to fit the multitude of quasar absorption troughs efficiently and accurately. We have identified the most energetic quasar-driven outflows on record and discovered the largest acceleration and velocity-shift for a quasar absorption outflow. (3). By using the VLT data, Xu led the project to study the relationships between BAL outflows and emission line outflows. We found possible connections between these two types of quasar outflows, e.g., the luminosity of the [oiii] ly 5007 emission profile decreases with increasing ne derived from the BAL outflow in the same quasar. These findings are consistent with BAL and emission outflows being different manifestations of the same wind, and the observed relationships are likely a reflection of the outflow density distribution. Advisors/Committee Members: Arav, Nahum (committeechair), Gray, James Alexander (committee member), Simonetti, John H. (committee member), Horiuchi, Shunsaku (committee member).

Subjects/Keywords: Quasar Outflow; Quasar Absorption and Emission Lines; Galaxy Evolution; Quasar Kinematics and Dynamics; Active Galactic Nuclei

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

APA (6th Edition):

Xu, X. (2020). How Do Quasars Impact Their Host Galaxies? From the Studies of Quasar Outflows in Absorption and Emission. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/98572

Chicago Manual of Style (16th Edition):

Xu, Xinfeng. “How Do Quasars Impact Their Host Galaxies? From the Studies of Quasar Outflows in Absorption and Emission.” 2020. Doctoral Dissertation, Virginia Tech. Accessed April 18, 2021. http://hdl.handle.net/10919/98572.

MLA Handbook (7th Edition):

Xu, Xinfeng. “How Do Quasars Impact Their Host Galaxies? From the Studies of Quasar Outflows in Absorption and Emission.” 2020. Web. 18 Apr 2021.

Vancouver:

Xu X. How Do Quasars Impact Their Host Galaxies? From the Studies of Quasar Outflows in Absorption and Emission. [Internet] [Doctoral dissertation]. Virginia Tech; 2020. [cited 2021 Apr 18]. Available from: http://hdl.handle.net/10919/98572.

Council of Science Editors:

Xu X. How Do Quasars Impact Their Host Galaxies? From the Studies of Quasar Outflows in Absorption and Emission. [Doctoral Dissertation]. Virginia Tech; 2020. Available from: http://hdl.handle.net/10919/98572

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