Photon Emission Near Extreme Kerr Black Holes
General Relativity and Quantum Cosmology
2017-03-09 v2 High Energy Astrophysical Phenomena
High Energy Physics - Theory
Abstract
Ongoing astronomical efforts extract physical properties of black holes from electromagnetic emissions in their near-vicinity. This requires finding the null geodesics which extend from the near-horizon region out to a distant observatory. In general these can only be found numerically. In this paper, for the interesting special case of extremally spinning Kerr black holes, we use an emergent near-horizon conformal symmetry to find near-superradiant geodesics analytically.
Keywords
Cite
@article{arxiv.1607.06028,
title = {Photon Emission Near Extreme Kerr Black Holes},
author = {Achilleas P. Porfyriadis and Yichen Shi and Andrew Strominger},
journal= {arXiv preprint arXiv:1607.06028},
year = {2017}
}
Comments
12 pages, v2: equations fixed, reference added