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

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

2005-02-14

arxiv.org/abs/gr-qc/0502065v2

Phys.Rev. D71 (2005) 124008

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

13 pages, 3 figures. Minor changes to match version accepted in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.71.124008

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 Q

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