Energetics and optical properties of 6-dimensional rotating black hole in pure Gauss–Bonnet gravity

Ahmadjon Abdujabbarov (Ulugh Beg Astronomical Institute, Astronomicheskaya 33, 100052, Tashkent, Uzbekistan; Institute of Nuclear Physics, Ulughbek, 100214, Tashkent, Uzbekistan) ; Farruh Atamurotov (Institute of Nuclear Physics, Ulughbek, 100214, Tashkent, Uzbekistan; Inha University in Tashkent, 100170, Tashkent, Uzbekistan) ; Naresh Dadhich (Centre for Theoretical Physics, Jamia Millia Islamia, 110025, New Delhi, India; Inter-University Centre for Astronomy and Astrophysics, Post Bag 4, Ganeshkhind, 411 007, Pune, India) ; Bobomurat Ahmedov (Ulugh Beg Astronomical Institute, Astronomicheskaya 33, 100052, Tashkent, Uzbekistan; Institute of Nuclear Physics, Ulughbek, 100214, Tashkent, Uzbekistan) ; Zdeněk Stuchlík (Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezrucovo nam. 13, Opava, Czech Republic)

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.

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      "value": "We study physical processes around a rotating black hole in pure Gauss\u00e2\u0080\u0093Bonnet (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\u00c2 % and the particle acceleration is increased to 55.28\u00c2 %; the optical shadow of the black hole is decreased. These are in principle distinguishing observable features of a pure GB black hole."
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Published on:
28 August 2015
Publisher:
Springer/Società Italiana di Fisica
Published in:
European Physical Journal C (2015)
Issue 8
DOI:
https://doi.org/10.1140/epjc/s10052-015-3604-5
Copyrights:
The Author(s)
Licence:
CC-BY-3.0

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