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arXiv · 0705.1179

Analytic Study of Rotating Black-Hole Quasinormal Modes

Uri Keshet·Shahar Hod
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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.

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Uri Keshet, Shahar Hod. 2007-08-24. Analytic Study of Rotating Black-Hole Quasinormal Modes. https://doi.org/10.1103/physrevd.76.061501

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