Accretion Geometry of Black Hole X-ray Binaries: Insights from X-ray Observations
High Energy Astrophysical Phenomena
2026-03-11 v2
Abstract
The accretion-ejection activities of black holes play a vital role in shaping the Universe. Bright and recurrent black hole X-ray binaries are ideal objects for studying accretion physics across a wide range of accretion rates, providing insights into the understanding of their supermassive counterparts. This short review summarizes X-ray techniques capable of measuring accretion geometry, our current understanding, and open questions. In particular, X-ray spectroscopic studies indicate that the accretion disk can extend close to the innermost stable circular orbit in the bright hard state. Some hints of disk-corona-jet connections are also discussed.
Keywords
Cite
@article{arxiv.2603.00833,
title = {Accretion Geometry of Black Hole X-ray Binaries: Insights from X-ray Observations},
author = {Honghui Liu},
journal= {arXiv preprint arXiv:2603.00833},
year = {2026}
}
Comments
52 pages, 7 figures, Accepted for publication in Astrophysics and Space Science