Energetics and optical properties of 6dimensional rotating black hole in pure GaussBonnet gravity
Abstract
We study physical processes around a rotating black hole in pure GaussBonnet (GB) gravity. In pure GB gravity, the gravitational potential has a slower falloff as compared to the corresponding Einstein potential in the same dimension. It is therefore expected that the energetics of a pure GB black hole would be weaker, and our analysis bears out that the efficiency of energy extraction by the Penroseprocess is increased to 25.8 % and the particle acceleration is increased to 55.28 %; the optical shadow of the black hole is decreased. These are in principle distinguishing observable features of a pure GB black hole.
 Publication:

European Physical Journal C
 Pub Date:
 August 2015
 DOI:
 10.1140/epjc/s1005201536045
 arXiv:
 arXiv:1508.00331
 Bibcode:
 2015EPJC...75..399A
 Keywords:

 General Relativity and Quantum Cosmology;
 Astrophysics  High Energy Astrophysical Phenomena
 EPrint:
 10 pages, 8 figures