Energetics and optical properties of 6-dimensional rotating black hole in pure Gauss–Bonnet gravity
Ahmadjon AbdujabbarovInstitute of Nuclear Physics, Ulughbek, Tashkent, 100214, UzbekistanFarruh AtamurotovInha University in Tashkent, Tashkent, 100170, UzbekistanNaresh DadhichCentre for Theoretical Physics, Jamia Millia Islamia, New Delhi, 110025, IndiaBobomurat AhmedovInstitute of Nuclear Physics, Ulughbek, Tashkent, 100214, UzbekistanZdeněk StuchlíkInstitute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezrucovo nam. 13, Opava, Czech Republic
ABI
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.
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