EVOLUTION OF ELECTROMAGNETIC AND DIRAC PERTURBATIONS AROUND A BLACK HOLE IN HOŘAVA GRAVITY
| Autor: | Nijo Varghese, V. C. Kuriakose |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Physics
Nuclear and High Energy Physics Field (physics) Spacetime Dirac (video compression format) FOS: Physical sciences General Physics and Astronomy Astronomy and Astrophysics General Relativity and Quantum Cosmology (gr-qc) General Relativity and Quantum Cosmology WKB approximation Black hole Schwarzschild metric Time domain Schwarzschild radius Mathematical physics |
| Zdroj: | Modern Physics Letters A. 26:1645-1656 |
| ISSN: | 1793-6632 0217-7323 |
| DOI: | 10.1142/s0217732311035936 |
| Popis: | The evolution of electromagnetic and Dirac perturbations in the spacetime geometry of Kehagias-Sfetsos(KS) black hole in the deformed Horava-Lifshitz(HL) gravity is investigated and the associated quasinormal modes are evaluated using time domain integration and WKB methods. We find a considerable deviation in the nature of field evolution in HL theory from that in the Schwarzschild spacetime and QNMs region extends over a longer time in HL theory before the power-law tail decay begins. The dependence of the field evolution on the HL parameter $\alpha$ are studied. In the time domain picture we find that the length of QNM region increases with $\alpha$. But the late time decay of field follows the same power-law tail behavior as in the case of Schwarzschild black hole. Comment: The article was fully rewritten, references added, to appear in MPLA |
| Databáze: | OpenAIRE |
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