Thakurta metric does not describe a cosmological black hole
General Relativity and Quantum Cosmology
2022-08-02 v5 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
Abstract
Recently, the Thakurta metric has been adopted as a model of primordial black holes. We show that the spacetime described by this metric has neither black-hole event horizon nor black-hole trapping horizon and involves the violation of all the standard energy conditions as a solution of the Einstein equation. Therefore, this metric does not describe a cosmological black hole in the early universe. It is pointed out that a contradictory claim by the other group stems from an incorrect choice of sign.
Keywords
Cite
@article{arxiv.2106.06651,
title = {Thakurta metric does not describe a cosmological black hole},
author = {Tomohiro Harada and Hideki Maeda and Takuma Sato},
journal= {arXiv preprint arXiv:2106.06651},
year = {2022}
}
Comments
6 pages, 2 figures, discussion expanded, conclusion unchanged