Analytic Study of Rotating Black-Hole Quasinormal Modes
General Relativity and Quantum Cosmology
2008-11-26 v2 Astrophysics
High Energy Physics - Theory
Abstract
A Bohr-Sommerfeld equation is derived for the highly-damped quasinormal mode frequencies omega(n>>1) of rotating black holes. It may be written as 2\int_C(p_r+ip_0)dr=(n+1/2)h, where p_r is the canonical momentum conjugate to the radial coordinate r along null geodesics of energy hbar*omega and angular momentum hbar*m, p_0=O(omega^0), and the contour C connects two complex turning points of p_r. The solutions are omega(n) = - m*omega_0 - i(phi + n*delta), where {omega_0,delta}>0 are functions of the black-hole parameters alone. Some physical implications are discussed.
Cite
@article{arxiv.0705.1179,
title = {Analytic Study of Rotating Black-Hole Quasinormal Modes},
author = {Uri Keshet and Shahar Hod},
journal= {arXiv preprint arXiv:0705.1179},
year = {2008}
}