Regular Article – Theoretical Physics
Dynamics of charged particles and magnetic dipoles around magnetized quasi-Schwarzschild black holes
Center for Field Theory and Particle Physics and Department of Physics, Fudan University, 200438, Shanghai, People’s Republic of China
2 Akfa University, Kichik Halqa Yuli Street 17, 100095, Tashkent, Uzbekistan
3 Ulugh Beg Astronomical Institute, Astronomy Str. 33, 100052, Tashkent, Uzbekistan
4 Institute of Nuclear Physics, Ulugbek 1, 100214, Tashkent, Uzbekistan
5 National University of Uzbekistan, 100174, Tashkent, Uzbekistan
6 Shanghai Astronomical Observatory, 80 Nandan Road, 200030, Shanghai, People’s Republic of China
7 Tashkent Institute of Irrigation and Agricultural Mechanization Engineers, Kori Niyoziy, 39, 100000, Tashkent, Uzbekistan
Accepted: 19 March 2021
Published online: 31 March 2021
In the present paper, we have investigated the motion of charged particles together with magnetic dipoles to determine how well the spacetime deviation parameter and external uniform magnetic field can mimic the spin of a rotating Kerr black hole. Investigation of charged particle motion has shown that the deviation parameter in the absence of an external magnetic fields can mimic the rotation parameter of the Kerr spacetime up to . The combination of an external magnetic field and deviation parameter can do even a better job mimicking the rotation parameter up to , which corresponds to the rapidly rotating case. Study of the dynamics of the magnetic dipoles around quasi-Schwarzschild black holes in the external magnetic field has shown that there are degeneracy values of the ISCO radius of test particles at which may lead to two different values of the innermost stable circular orbit (ISCO) radius. When the deviation parameter is in the range of , it can mimic the spin of a rotating Kerr black hole in the range for magnetic dipoles with values of the magnetic coupling parameter in corotating orbits.
© The Author(s) 2021
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