Extremal Kerr black holes as amplifiers of new physics
High Energy Physics - Theory
2024-07-11 v3 High Energy Astrophysical Phenomena
General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
We show that extremal Kerr black holes are sensitive probes of new physics. Stringy or quantum corrections to general relativity are expected to generate higher-curvature terms in the gravitational action. We show that in the presence of these terms, asymptotically flat extremal rotating black holes have curvature singularities on their horizon. Furthermore, near-extremal black holes can have large yet finite tidal forces for infalling observers. In addition, we consider five-dimensional extremal charged black holes and show that higher-curvature terms can have a large effect on the horizon geometry.
Keywords
Cite
@article{arxiv.2303.07358,
title = {Extremal Kerr black holes as amplifiers of new physics},
author = {Gary T. Horowitz and Maciej Kolanowski and Grant N. Remmen and Jorge E. Santos},
journal= {arXiv preprint arXiv:2303.07358},
year = {2024}
}
Comments
6 pages (+ 4 pages supplementary material), v2 matches published version, v3 contains an added note about parity-odd terms