Quasinormal modes, Superradiance and Area Spectrum for 2+1 Acoustic Black Holes

Details Quasinormal modes, Superradiance and Area Spectrum for 2+1 Acoustic Black Holes Quasinormal modes, Superradiance and Area Spectrum for 2+1 Acoustic Black Holes

2004-10-16

arxiv.org/abs/gr-qc/0410074v3

Phys.Lett. B617 (2005) 174-181

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

10 pages, Final version, an appendix and some references was added, accepted by Phys. Lett. B

Scientific paper

10.1016/j.physletb.2005.05.021

We present an exact expression for the quasinormal modes of acoustic disturbances in a rotating 2+1 dimensional sonic black hole (draining bathtub fluid flow) in the low frequency limit and evaluate the adiabatic invariant proposed by Kunstatter. We also compute,via Bohr-Sommerfeld quantization rule the equivalent area spectrum for this acoustic black hole, and we compute the superradiance phenomena for pure spinning 2+1 black holes.

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