Quasi-normal modes for doubly rotating black holes

Abstract

Based on the work of Chen, Lü and Pope, we derive expressions for the $D\ge 6$ dimensional metric for Kerr-(A)dS black holes with two independent rotation parameters and all others set equal to zero: $a_1\ne 0,a_2\ne 0,a_3=a_4=...=0$. The Klein-Gordon equation is then explicitly separated on this background. For $D\ge 6$ this separation results in a radial equation coupled to two generalized spheroidal angular equations. We then develop a full numerical approach that utilizes the Asymptotic Iteration Method (AIM) to find radial Quasi-Normal Modes (QNMs) of doubly rotating flat Myers-Perry black holes for slow rotations. We also develop perturbative expansions for the angular quantum numbers in powers of the rotation parameters up to second order.

RevTeX 4-1, various figures

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