How sensitive is Hawking radiation to superluminal dispersion relations?
- Instituto de Astrofisica de Andalucia, CSIC, Camino Bajo de Huetor 50, 18008 Granada (Spain)
- Departamento de Fisica Teorica II, Universidad Complutense de Madrid, 28040 Madrid (Spain)
We discuss the Hawking radiation process in a collapse scenario with superluminal dispersion relations. Due to these superluminal modifications, the horizon effectively becomes frequency-dependent. At every moment of the collapse, a critical frequency can be calculated such that frequencies higher than this critical frequency do not couple to the collapsing geometry and hence do not see any horizon. We discuss three important consequences. First, the late-time radiation in general has a lower intensity than in the standard Hawking picture. Second, the thermal output spectrum depends on the surface gravity, thereby effectively exploring the physics inside the black hole. Third, the radiation dies off as time advances.
- OSTI ID:
- 21304817
- Journal Information:
- AIP Conference Proceedings, Vol. 1122, Issue 1; Conference: Spanish relativity meeting 2008, Salamanca (Spain), 15-19 Sep 2008; Other Information: DOI: 10.1063/1.3141303; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Pre-Hawking radiation cannot prevent the formation of apparent horizon
Hawking radiation and the boomerang behavior of massive modes near a horizon