Critical Emission from a High-Spin Black Hole
General Relativity and Quantum Cosmology
2018-03-26 v2 High Energy Astrophysical Phenomena
High Energy Physics - Theory
Abstract
We consider a rapidly spinning black hole surrounded by an equatorial, geometrically thin, slowly accreting disk that is stationary and axisymmetric. We analytically compute the broadening of electromagnetic line emissions from the innermost part of the disk, which resides in the near-horizon region. The result is independent of the disk's surface emissivity and therefore universal. This is an example of critical behavior in astronomy that is potentially observable by current or future telescopes.
Cite
@article{arxiv.1712.10182,
title = {Critical Emission from a High-Spin Black Hole},
author = {Alexandru Lupsasca and Achilleas P. Porfyriadis and Yichen Shi},
journal= {arXiv preprint arXiv:1712.10182},
year = {2018}
}
Comments
12 pages, 3 figures. v2: minor edits, matches published version