{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/112996"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/112996","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"On electromagnetic observables from supermassive black hole accretion flows","abstract":"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.","abstract_html":"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.","abstract_has_math":false,"creators":["Wong, George Nathaniel"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Gammie, Charles F.","Holder, Gilbert","Cooper, S. Lance","Liu, Xin"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2022,"date_issued":"2022-01-12T21:45:29Z","date_published":"2022-01-12T21:45:29Z","updated_at":"2026-07-22T22:24:52Z","subjects":["Black holes","Accretion disks","Magnetohydrodynamics (MHD)","Astrophysics","Radiative transfer","General relativity (GR)"],"languages":["en"],"rights":["Copyright 2021 George Nathaniel Wong"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/112996","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Gammie, Charles F.","Holder, Gilbert","Cooper, S. 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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). 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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). 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