Massive vector fields in Kerr--Newman and Kerr--Sen black hole spacetimes
High Energy Physics - Theory
2020-05-20 v1 General Relativity and Quantum Cosmology
Abstract
The superradiant instability modes of ultralight massive vector bosons are studied for weakly charged rotating black holes in Einstein--Maxwell gravity (the Kerr--Newman solution) and low-energy heterotic string theory (the Kerr--Sen black hole). We show that in both these cases, the corresponding massive vector (Proca) equations can be fully separated, exploiting the hidden symmetry present in these spacetimes. The resultant ordinary differential equations are solved numerically to find the most unstable modes of the Proca field in the two backgrounds and compared to the vacuum (Kerr black hole) case.
Keywords
Cite
@article{arxiv.1912.08224,
title = {Massive vector fields in Kerr--Newman and Kerr--Sen black hole spacetimes},
author = {Ramiro Cayuso and Oscar J. C. Dias and Finnian Gray and David Kubiznak and Aoibheann Margalit and Jorge E. Santos and Renato Gomes Souza and Leander Thiele},
journal= {arXiv preprint arXiv:1912.08224},
year = {2020}
}
Comments
25 pages, 12 figures