https://doi.org/10.1140/epjc/s10052-025-13755-4
Regular Article - Theoretical Physics
Parameter constraints on a black hole with Minkowski core through quasiperiodic oscillations
1
School of Mathematics, Physics and Statistics, Shanghai University of Engineering Science, 201620, Shanghai, China
2
Center of Application and Research of Computational Physics, Shanghai University of Engineering Science, 201620, Shanghai, China
3
College of Physics and Electronic Information Engineering, Neijiang Normal University, 641112, Neijiang, China
4
Center for Gravitation and Cosmology, College of Physical Science and Technology, Yangzhou University, 225002, Yangzhou, China
5
Escola de Engenharia de Lorena, Universidade de São Paulo, 12602-810, Lorena, SP, Brazil
a
mhwu@njtc.edu.cn
b
xmeikuang@yzu.edu.cn
Received:
25
November
2024
Accepted:
28
December
2024
Published online:
28
January
2025
We investigate the geodesic motion of charged particles in the vicinity of regular black holes with a Minkowski core, embedded in a uniform magnetic field, and study the influences of magnetic field and regular black hole parameter on the radial effective potential and angular momentum of the particles’ orbits. We perturb the circular orbit and analyze the characteristic frequencies of the epicyclic oscillations, which are closely related with the quasiperiodic oscillations (QPOs) phenomena of the accretion disc surrounding the black hole. Then using the MCMC simulation, we fit our theoretical results with four observational QPOs events (GRO J1655-40, XTE J1550-564, XTE J1859+226, and GRS 1915+105) and provide constraints on the magnetic field strength B, the characteristic radius r, the mass M, and the regular black hole parameter g. In particular, since the parameter g describes the degree of deviation from the classical Schwarzschild black hole, our studies suggest that, within a certain level of confidence, the black holes in the current model can deviate from the classical singularity structure of Schwarzschild black holes, and exhibit quantum corrections near the core.
© The Author(s) 2025
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