Can we detect a supertranslated black hole?
General Relativity and Quantum Cosmology
2022-04-13 v4 High Energy Physics - Theory
Abstract
We attempt to address the question of whether standard tests of general relativity can detect the presence of a black hole carrying a supertranslation field. In this regard, we study the photon sphere of a dynamical black hole carrying a supertranslation hair. We find that the dynamics of the photon sphere is quite subtle and it may offer an opportunity to differentiate a supertranslated black hole from its bald counterpart. This represents a first step towards understanding the observational signatures of a supertranslated dynamical black hole.
Cite
@article{arxiv.2110.03547,
title = {Can we detect a supertranslated black hole?},
author = {Subhodeep Sarkar and Shailesh Kumar and Srijit Bhattacharjee},
journal= {arXiv preprint arXiv:2110.03547},
year = {2022}
}
Comments
8 Pages, 4 Figures, text substantially modified, new results added, to appear in Physical Review D