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Probing Black Hole Spacetime With Very Long Baseline Interferometry Measurements
Probing Black Hole Spacetime With Very Long Baseline Interferometry Measurements
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105102
- ISBN
- 9798293894888
- DDC
- 523
- 저자명
- Jia, He.
- 서명/저자
- Probing Black Hole Spacetime With Very Long Baseline Interferometry Measurements
- 발행사항
- [Sl] : Princeton University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 276 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-04, Section: B.
- 주기사항
- Advisor: Quataert, Eliot.
- 학위논문주기
- Thesis (Ph.D.)--Princeton University, 2025.
- 초록/해제
- 요약The Event Horizon Telescope (EHT) has produced the first Very Long Baseline Interferometry (VLBI) images of the supermassive black holes M87* and Sgr A*, marking a major breakthrough in both black hole astrophysics and experimental tests of strong-field general relativity. This dissertation investigates how current and future VLBI observations can further advance our understanding of black holes. I begin by examining the effects of tilted magnetic fields and flare states on EHT images, polarization, and light curves. Due to limited resolution, ground-based VLBI primarily captures the direct emission from the accretion flow, while resolving higher-order lensed photon rings, which encode critical spacetime information, requires a space-based VLBI mission such as the proposed Black Hole Explorer (BHEX).Building on prior work on the visibility of idealized zero-width rings, I developed a perturbative framework for finite-width photon rings, showing that the oscillation of visibility amplitude is governed by the ring's center-of-light diameter, with additional corrections from its finite width. Using mock visibility data generated from ray-tracing of General Relativistic Magnetohydrodynamic (GRMHD) simulations, I systematically assess the uncertainties in photon ring diameter measurements and demonstrate that percent level accuracy can be achieved by a BHEX-style mission in the near future.
- 일반주제명
- Astrophysics
- 일반주제명
- Astronomy
- 일반주제명
- Physics
- 기타저자
- Princeton University Astrophysical Sciences
- 기본자료저록
- Dissertations Abstracts International. 87-04B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■006m o d
■007cr#unu||||||||
■020 ▼a9798293894888
■035 ▼a(MiAaPQ)AAI32236138
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a523
■1001 ▼aJia, He.▼0(orcid)0000-0002-9958-7758
■24510▼aProbing Black Hole Spacetime With Very Long Baseline Interferometry Measurements
■260 ▼a[Sl]▼bPrinceton University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a276 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-04, Section: B.
■500 ▼aAdvisor: Quataert, Eliot.
■5021 ▼aThesis (Ph.D.)--Princeton University, 2025.
■520 ▼aThe Event Horizon Telescope (EHT) has produced the first Very Long Baseline Interferometry (VLBI) images of the supermassive black holes M87* and Sgr A*, marking a major breakthrough in both black hole astrophysics and experimental tests of strong-field general relativity. This dissertation investigates how current and future VLBI observations can further advance our understanding of black holes. I begin by examining the effects of tilted magnetic fields and flare states on EHT images, polarization, and light curves. Due to limited resolution, ground-based VLBI primarily captures the direct emission from the accretion flow, while resolving higher-order lensed photon rings, which encode critical spacetime information, requires a space-based VLBI mission such as the proposed Black Hole Explorer (BHEX).Building on prior work on the visibility of idealized zero-width rings, I developed a perturbative framework for finite-width photon rings, showing that the oscillation of visibility amplitude is governed by the ring's center-of-light diameter, with additional corrections from its finite width. Using mock visibility data generated from ray-tracing of General Relativistic Magnetohydrodynamic (GRMHD) simulations, I systematically assess the uncertainties in photon ring diameter measurements and demonstrate that percent level accuracy can be achieved by a BHEX-style mission in the near future.
■590 ▼aSchool code: 0181.
■650 4▼aAstrophysics
■650 4▼aAstronomy
■650 4▼aPhysics
■653 ▼aVery Long Baseline Interferometry
■653 ▼aEvent Horizon Telescope
■653 ▼aBlack Hole Explorer
■690 ▼a0596
■690 ▼a0606
■690 ▼a0605
■71020▼aPrinceton University▼bAstrophysical Sciences.
■7730 ▼tDissertations Abstracts International▼g87-04B.
■790 ▼a0181
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359326▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
