Dynamics of test particles around magnetically charged regular black holes

Abstract

In this work, we have provided detailed studies of motion test neutral, photon, neutrino-like, magnetized, and magnetically charged particles around a magnetically charged regular black hole (BH) together with properties of the spacetime curvature and event horizon around the BH. In order to see differences of linear electrodynamic (LED) and nonlinear electrodynamic (NED) charge effects in these studies, we have compared all the obtained results with the results obtained in Reissner–Nordstöm (RN) BH. It has been shown that an increase of the magnetic charge causes a decrease in the curvature invariants and event horizon radius. The study of the impact parameter for photons and neutrino-like particles has shown the effect of the magnetic charge of the regular BH, stronger than the RN one. Harmonic oscillations of test particles around regular BHs are studied. As an astrophysical application of the study, we also have provided comparisons of the effects of rotating Kerr BH spin and magnetic charge of the BH on upper, [Formula: see text] and lower, [Formula: see text] frequencies of twin peak quasi-periodic oscillations (QPOs) and represented possible values of the upper and lower frequencies of the twin-peak QPOs around these BHs in various QPO models. Finally, it is shown that the effect of magnetic charge on the ISCO radius of magnetized particles becomes stronger in higher values of magnetized parameters of the magnetized particles, where the effects of RN BH and regular BH charges become distinguishable.