Abstract
We numerically study the scalar perturbation of a rotating black hole in anti-de Sitter spacetime (Kerr-AdS black hole). It is found that small Kerr-AdS black holes characterized by r+□0.16ℓ are unstable against scalar perturbations via the superradiant amplification mechanism for some rotation rates, where r+ and ℓ stand, respectively, for the radial coordinate value of the black hole event horizon in the Boyer-Lindquist coordinates and the cosmological length-scale, defined by ℓ=(-3/Λ)1/2. Here Λ is the (negative) cosmological constant.
| Original language | English |
|---|---|
| Article number | 084020 |
| Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
| Volume | 80 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 2009 Oct 15 |
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)