Gravitational synchrotron radiation and Penrose process in STVG theory

Bobur Turimov; Husan Alibekov; Pulat Tadjimuratov; Ahmadjon Abdujabbarov

Physics Letters B (Aug 2023)

Gravitational synchrotron radiation and Penrose process in STVG theory

Bobur Turimov,
Husan Alibekov,
Pulat Tadjimuratov,
Ahmadjon Abdujabbarov

Affiliations

Bobur Turimov: School of Applied Mathematics, New Uzbekistan University, Mustaqillik Avenue 54, Tashkent 100007, Uzbekistan; School of Engineering, Akfa University, Milliy Bog St. 264, Tashkent 111221, Uzbekistan; Ulugh Beg Astronomical Institute, Astronomy St. 33, Tashkent 100052, Uzbekistan; Webster University Tashkent, Alisher Navoiy Avenue 13, Tashkent 100011, Uzbekistan; Corresponding author.
Husan Alibekov: Ulugh Beg Astronomical Institute, Astronomy St. 33, Tashkent 100052, Uzbekistan; National University of Uzbekistan, Tashkent 100174, Uzbekistan
Pulat Tadjimuratov: Ulugh Beg Astronomical Institute, Astronomy St. 33, Tashkent 100052, Uzbekistan; Webster University Tashkent, Alisher Navoiy Avenue 13, Tashkent 100011, Uzbekistan
Ahmadjon Abdujabbarov: Ulugh Beg Astronomical Institute, Astronomy St. 33, Tashkent 100052, Uzbekistan; Webster University Tashkent, Alisher Navoiy Avenue 13, Tashkent 100011, Uzbekistan; National University of Uzbekistan, Tashkent 100174, Uzbekistan; Tashkent State Technical University, Tashkent 100095, Uzbekistan

Journal volume & issue: Vol. 843
p. 138040

Abstract

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The paper has explored analogue of gravitational synchrotron massive particle and Penrose process in MOdified Gravity (MOG) known as Scalar-Tensor-Vector-Gravity (STVG). Investigation of the gravitational field around Kerr-MOG black hole showed that it has strong gravitational field with large horizon and can rotate faster than Kerr black hole due to the effect of STVG. We have studied influence of STVG in circular motion of massive particle around Kerr-MOG black hole and discussed the Innermost Stable Circular Orbit (ISCO) of massive test particle. It is shown that STVG plays a crucial role in energy extraction from a rotating black hole, with an energy efficiency of more than 100% according to the Penrose process. Furthermore, we have explored the gravitational synchrotron radiation analogue produced by a massive particle orbiting around a Kerr-MOG black hole. It has been shown that the intensity of gravitational radiation from binary systems of stellar black holes (SBH) and supermassive black holes (SMBH).

Published in Physics Letters B

ISSN: 0370-2693 (Print); 1873-2445 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/physics-letters-b/

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