Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2003-01-15
Phys.Rev.D67:064020,2003
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
13 papges, 5 figures, Phys. Rev. D in press, minor changes and new references
Scientific paper
10.1103/PhysRevD.67.064020
We study scalar, electromagnetic and gravitational perturbations of a Reissner-Nordstr\"om-anti-de Sitter (RN-AdS) spacetime, and compute its quasinormal modes (QNM's). We confirm and extend results previously found for Schwarzschild-anti-de Sitter (S-AdS) black holes. For ``large'' black holes, whose horizon is much larger than the AdS radius, different classes of perturbations are almost exactly {\it isospectral}; this isospectrality is broken when the black hole's horizon radius is comparable to the AdS radius. We provide very accurate fitting formulas for the QNM's, which are valid for black holes of any size and charge $Q
Berti Emanuele
Kokkotas Kostas D.
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