Hawking radiation from a (4+n)dimensional rotating black hole on the brane
Abstract
We study the emission of Hawking radiation in the form of scalar fields from a (4+n)dimensional, rotating black hole on the brane. We perform a numerical analysis to solve both the radial and angular parts of the scalar field equation, and derive exact results for the Hawking radiation energy emission rate. We find that, in 5 dimensions, as the angular momentum increases, the emission rate is suppressed in the lowenergy regime but significantly enhanced in the intermediate and highenergy regimes. For higher values of n, the Hawking radiation emission rate on the brane is significantly enhanced, with the angular momentum, over the whole energy regime. We also investigate the energy amplification due to the effect of superradiance and demonstrate that, in the presence of extra dimensions, this effect is again significantly enhanced.
 Publication:

Physics Letters B
 Pub Date:
 February 2006
 DOI:
 10.1016/j.physletb.2005.10.025
 arXiv:
 arXiv:hepth/0503010
 Bibcode:
 2006PhLB..633..106H
 Keywords:

 High Energy Physics  Theory;
 Astrophysics;
 General Relativity and Quantum Cosmology;
 High Energy Physics  Phenomenology
 EPrint:
 9 pages, Latex file, 5 figures, a new figure and a paragraph have been added along with some clarifying comments, version to appear in Phys. Lett. B