Near-horizon structure of escape zones of electrically charged particles around weakly magnetized rotating black hole: case of oblique magnetosphere

TL;DR

This paper investigates how large-scale, inclined magnetic fields influence the escape trajectories of charged particles near a rotating black hole, revealing increased unbound orbits and relativistic velocities due to broken axial symmetry.

Contribution

It introduces a numerical analysis of non-axisymmetric magnetic fields affecting charged particle escape zones around rotating black holes, highlighting the impact of magnetic inclination.

Findings

Inclined magnetic fields increase unbound orbit fractions.

Charged particles can reach ultrarelativistic velocities.

Breaking axial symmetry enhances particle escape likelihood.

Abstract

We study the effects of large scale magnetic fields on the dynamics of charged particles near a rotating black hole. We consider a scenario in which the initially neutral particles on geodesic orbits in the equatorial plane become ionized, and hence they are destabilized by the charging process. Fraction of charged particles are then accelerated out of the equatorial plane and then follow jet like trajectories with relativistic velocities. We explore non axisymmetric systems in which the magnetic field is inclined with respect to the black hole spin. We study the system numerically in order to locate the zones of escaping trajectories and compute the terminal escape velocity. By breaking the axial symmetry we notice increasing fraction of unbound orbits which allow for acceleration to ultrarelativistic velocities.