Accretion around black holes: The geometry and spectra

Observations of black hole X-ray binaries and active galactic nuclei indicate that the accretion flows around black holes are composed of hot and cold gas, which have been theoretically described in terms of either a hot geometrically thick corona lying above and below a cold geometrically thin disk...

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Bibliographic Details
Published in:iScience 2022-01, Vol.25 (1), p.103544-103544, Article 103544
Main Authors: Liu, B.F., Qiao, Erlin
Format: Article
Language:English
Subjects:
Astrophysics
Natural sciences
Review
Space sciences
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Summary:Observations of black hole X-ray binaries and active galactic nuclei indicate that the accretion flows around black holes are composed of hot and cold gas, which have been theoretically described in terms of either a hot geometrically thick corona lying above and below a cold geometrically thin disk or an inner advection dominated accretion flow connected to an outer thin disk. This article reviews the accretion flows around black holes, with an emphasis on the physics that determines the configuration of hot and cold accreting gas, and how the configuration varies with the accretion rate and thereby produces various luminosity and spectra. Astrophysics; Natural sciences; Space sciences
ISSN:2589-0042
2589-0042
DOI:10.1016/j.isci.2021.103544