Stability of black holes in Horava gravity: Gravitational quasinormal modes

Details Stability of black holes in Horava gravity: Gravitational quasinormal modes Stability of black holes in Horava gravity: Gravitational quasinormal modes

2009-09-27

arxiv.org/abs/0909.4944v3

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

9 pages, reference added

Scientific paper

Gravitational perturbations in the geometry of asymptotically flat black hole solution in the deformed Ho\v{r}ava-Lifshitz(HL) gravity are considered and the associated quasinormal mode(QNM) frequencies are evaluated using WKB method. Black holes are found to be stable against small perturbations. We also find a significant deviation in the behavior of QNMs in HL theory for low values of HL parameter $\omega$, from that in the standard General Relativity(GR). QNMs are long lived in Ho\v{r}ava theory compared with the usual Schwarzschild black hole case.

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