Magnetosphere of black hole mimickers: Charged particle belts and repulsive barrier inside the photon sphere
Phys. Rev. D 113, 123013 – Published 4 June, 2026
DOI: https://doi.org/10.1103/fwdw-gpyz
Abstract
The exterior of magnetized black hole mimickers can be modeled as the Schwarzschild vacuum spacetime combined with a dipole magnetic field. We show that surprisingly, such magnetized mimickers can demonstrate strong signatures as a result of charged particle motion. For arbitrary values of magnetic repulsion, bound and curled near-equatorial trajectories are allowed inside the photon sphere at . Furthermore, high-energy particles can be magnetically repulsed in the region . On the other hand, a very fine tuning of the magnetic repulsion and particle motion constants is necessary for motion in off-equatorial belts or tori at . The particle motion is demonstrated for the case of the sole Lorentz force and with the inclusion of the radiative backreaction force.