Quasinormal modes from potentials surrounding the charged dilaton black hole

Details Quasinormal modes from potentials surrounding the charged dilaton black hole Quasinormal modes from potentials surrounding the charged dilaton black hole

2008-09-11

arxiv.org/abs/0809.1933v1

Eur.Phys.J.C58:617-625,2008

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

19 pages, 8 figures

Scientific paper

10.1140/epjc/s10052-008-0802-4

We clarify the purely imaginary quasinormal frequencies of a massless scalar perturbation on the 3D charged-dilaton black holes. This case is quite interesting because the potential-step appears outside the event horizon similar to the case of the electromagnetic perturbations on the large Schwarzschild-AdS black holes. It turns out that the potential-step type provides the purely imaginary quasinormal frequencies, while the potential-barrier type gives the complex quasinormal modes.

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