Quasinormal modes, superradiance and area spectrum for 2 + 1 acoustic black holes

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Abstract

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.

Original languageEnglish
Pages (from-to)174-181
Number of pages8
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume617
Issue number3-4
DOIs
StatePublished - 30 Jun 2005

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