https://doi.org/10.1140/epjc/s10052-015-3604-5
Regular Article - Theoretical Physics
Energetics and optical properties of 6-dimensional rotating black hole in pure Gauss–Bonnet gravity
1
Institute of Nuclear Physics, Ulughbek, Tashkent, 100214, Uzbekistan
2
Ulugh Beg Astronomical Institute, Astronomicheskaya 33, Tashkent, 100052, Uzbekistan
3
Inha University in Tashkent, Tashkent, 100170, Uzbekistan
4
Inter-University Centre for Astronomy and Astrophysics, Post Bag 4, Ganeshkhind, Pune, 411 007, India
5
Centre for Theoretical Physics, Jamia Millia Islamia, New Delhi, 110025, India
6
Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezrucovo nam. 13, Opava, Czech Republic
* e-mail: farruh@astrin.uz
Received:
30
June
2015
Accepted:
5
August
2015
Published online:
28
August
2015
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.
© The Author(s), 2015
