2026-09-22T06:25:03Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/112996 2023-07-11 col_2142_8859 col_2142_5131 com_2142_8858 com_2142_234 com_2142_5130

Gammie, Charles F. Holder, Gilbert Cooper, S. Lance Liu, Xin Wong, George Nathaniel 2022-01-12T21:45:29Z 2022-01-12T21:45:29Z 2021-07-08 2021-08 Relativistic jets have been observed to originate from the centers of many galaxies. It is likely that the jets are powered by spinning supermassive black holes via a dynamical interaction between magnetic fields close to the hole and the warped spacetime predicted by general relativity. This dissertation describes a series of projects aimed at understanding and identifying signatures of the physical quantities relevant to the black hole–jet connection in both observational and theoretical contexts. I start with a review of astrophysical black hole accretion systems and the radiative physics that governs the generation of electromagnetic signals from hot leptons near the hole. I then describe the numerical tools I use to simulate the accretion and generate synthetic images and spectra, paying particular attention to my contributions and extensions to the code. Next, I discuss my contribution to the theoretical analysis of the first event-horizon-scale black hole accretion flow images, which were produced by the Event Horizon Telescope. The remainder of the dissertation covers projects designed to support a theory-based guide for the next generation of electromagnetic black hole observation in the context of the jet–hole connection. I begin by describing two projects focused on understanding the composition of the jet near the hole. The first project studies mass entrainment through the jet–disk boundary layer as a mechanism to feed the jet at small scales. The second project studies electron–positron drizzle pair creation due to the background radiation field produced by the hot accretion flow. I conclude with a discussion of black hole glimmer, a novel universal signature of black hole spin that can be measured from high-resolution black hole movies and used to determine the orientation and magnitude of a black hole’s angular momentum vector. Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-01-12 without embargo terms The student, George Wong, accepted the attached license on 2021-07-07 at 16:38. The student, George Wong, submitted this Dissertation for approval on 2021-07-07 at 16:59. This Dissertation was approved for publication on 2021-07-08 at 17:23. DSpace SAF Submission Ingestion Package generated from Vireo submission #16788 on 2022-01-12 at 12:44:19 Made available in DSpace on 2022-01-12T21:45:29Z (GMT). No. of bitstreams: 3 WONG-DISSERTATION-2021.pdf: 31553542 bytes, checksum: 2391926464e242be5a4f6894cf15e23a (MD5) LICENSE.txt: 4208 bytes, checksum: 0aa5d42223a00a57921b45dbae764499 (MD5) PROQUEST_LICENSE.txt: 4554 bytes, checksum: fe2789e7c0769e2125ddc6e7c3831f21 (MD5) Previous issue date: 2021-07-08 application/pdf http://hdl.handle.net/2142/112996 en Copyright 2021 George Nathaniel Wong Black holes Accretion disks Magnetohydrodynamics (MHD) Astrophysics Radiative transfer General relativity (GR) On electromagnetic observables from supermassive black hole accretion flows text Thesis Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.