https://doi.org/10.1140/epjp/s13360-023-03979-2
Regular Article
Motion of charged and magnetized particles around regular black holes immersed in an external magnetic field in modified gravity
1
Institute of Fundamental and Applied Research, National Research University TIIAME, Kori Niyoziy 39, 100000, Tashkent, Uzbekistan
2
School of Mathematics and Natural Sciences, New Uzbekistan University, Mustaqillik Ave. 54, 100007, Tashkent, Uzbekistan
3
National University of Uzbekistan, 100174, Tashkent, Uzbekistan
4
Tashkent State Technical University, 100095, Tashkent, Uzbekistan
5
Samarkand State University, University Avenue 15, 140104, Samarkand, Uzbekistan
6
Ulugh Beg Astronomical Institute, Astronomy St. 33, 100052, Tashkent, Uzbekistan
7
Tashkent Institute of Irrigation and Agricultural Mechanization Engineers, Kori Niyoziy 39, 100000, Tashkent, Uzbekistan
8
Research Centre for Theoretical Physics and Astrophysics, Institute of Physics, Silesian University in Opava, Bezručovo nám. 13, 74601, Opava, Czech Republic
9
Karakalpak State University named after Berdakh, Ch.Abdirov Str. 1, 230112, Nukus, Republic of Karakalpakstan, Uzbekistan
10
Institute of Nuclear Physics, 100214, Tashkent, Uzbekistan
Received:
12
November
2022
Accepted:
13
April
2023
Published online:
26
April
2023
We study properties of spacetime around regular black holes (BHs) in modified gravity, so-called regular MOG BH. The motion of the test electrically neutral and charged, and particles with magnetic dipole moment, near the regular MOG BH, considering the BH is immersed in an external, asymptotically uniform magnetic field, have also been investigated. In a study of charged particles’ dynamics, we have shown that the radius of the particle’s innermost stable circular orbits (ISCOs) increases with respect to increasing the parameter of MOG, while as cyclotron frequency grows the ISCO radius decreases. Effects of MOG field on synchrotron radiation by charged particles have also been studied and obtained that the existence of the MOG parameter essentially decreases the total luminosity of the radiation. Moreover, through studies of the dynamics of magnetic dipoles, we have shown that the increase of the MOG and the magnetic coupling parameters lead to an increase of the inner radius and the width of the accretion disk consisting of test magnetized particles. Finally, it is obtained that the range for values of the magnetic coupling parameter for neutron stars orbiting supermassive black holes causes their orbits to be stable.
Ahmadjon Abdujabbarov, Dilshodbek Bardiev, Bobomurat Ahmedov and Mardon Abdullaev have contributed equally to this work.
Copyright comment Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
