https://doi.org/10.1140/epjc/s10052-024-12605-z
Regular Article - Theoretical Physics
Collisions and dynamics of particles with magnetic dipole moment and electric charge near magnetized rotating Kerr black holes
1
Ulugh Beg Astronomical Institute, Astronomy Str. 33, 100052, Tashkent, Uzbekistan
2
Institute of Nuclear Physics, Ulugbek 1, 100214, Tashkent, Uzbekistan
3
College of Mathematics and Statistics, Shenzhen University, 518060, Shenzhen, China
4
College of Physics and Optoelectronic Engineering, Shenzhen University, 518060, Shenzhen, China
5
School of Mathematics and Natural Sciences, New Uzbekistan University, Movarounnahr St. 1, 100007, Tashkent, Uzbekistan
6
Faculty of Computer Engineering, University of Tashkent for Applied Sciences, Gavhar Str. 1, 700127, Tashkent, Uzbekistan
7
Institute of Fundamental and Applied Research, National Research University TIIAME, Kori Niyoziy 39, 100000, Tashkent, Uzbekistan
8
Tashkent State Technical University, 100095, Tashkent, Uzbekistan
9
Institute of Theoretical Physics, National University of Uzbekistan, 100174, Tashkent, Uzbekistan
Received:
7
January
2024
Accepted:
21
February
2024
Published online:
20
March
2024
Analysis of test magnetized and charged particles around black holes immersed in external magnetic fields may help to explain the observed astrophysical phenomena related to black holes, such as the acceleration of particles up to high energies. In this sense, we studied the circular motion of test-charged particles with magnetic dipole orbiting around magnetized rotating Kerr black holes. First, we derive the effective potential for the circular motion of such particles, including interactions between the external magnetic field and the electric charge, and the magnetic interaction between the magnetic dipole. In addition, we analyze the angular momentum and energy of particles corresponding to circular orbits. The effects of magnetic interaction and coupling parameters on the position of innermost stable circular orbits (ISCOs), the energy and angular momentum of the particles at ISCO, and the energy efficiency from the Novikov-Thorne accretion disc have been investigated. We also find cases of degeneracy between magnetic dipole interaction and magnetic coupling parameters, giving the same ISCO radius. Finally, we studied various cases of collisions of neutral, magnetized, and electrically charged particles near rotating Kerr black holes in the presence of external magnetic fields. The critical angular momentum of spinning charged particles is found in which the particles can collide. We also analyze the effects of both magnetic interactions on the center-of-mass energy of the colliding particles.
© The Author(s) 2024
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