Publication date: Aug 2015
Abstract:
We study physical processes around a rotating black hole in pure
Gauss-Bonnet (GB) gravity. In pure GB gravity, the gravitational
potential has a slower fall-off 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.
Authors:
Abdujabbarov, Ahmadjon; Atamurotov, Farruh; Dadhich, Naresh; Ahmedov, Bobomurat; Stuchlík, Zdeněk;