Quasinormal modes of Kerr-Newman black holes: Coupling of electromagnetic and gravitational perturbations

Emanuele Berti and Kostas D. Kokkotas
Phys. Rev. D 71, 124008 – Published 3 June 2005

Abstract

We compute numerically the quasinormal modes of Kerr-Newman black holes in the scalar case, for which the perturbation equations are separable. Then we study different approximations to decouple electromagnetic and gravitational perturbations of the Kerr-Newman metric, computing the corresponding quasinormal modes. Our results suggest that the Teukolsky-like equation derived by Dudley and Finley gives a good approximation to the dynamics of a rotating charged black hole for QM/2. Though insufficient to deal with Kerr-Newman based models of elementary particles, the Dudley-Finley equation should be adequate for astrophysical applications.

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  • Received 14 February 2005

DOI:https://doi.org/10.1103/PhysRevD.71.124008

©2005 American Physical Society

Authors & Affiliations

Emanuele Berti

  • McDonnell Center for the Space Sciences, Department of Physics, Washington University, St. Louis, Missouri 63130, USA

Kostas D. Kokkotas

  • Department of Physics, Aristotle University of Thessaloniki, 54124, Greece

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Issue

Vol. 71, Iss. 12 — 15 June 2005

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