Abstract

Contributed Talk - Splinter Relativistic   (MW-2050)

Particle acceleration by magnetized rotating black hole

Vladimir Karas
Astronomical Institute of the Czech Academy of Sciences

Magnetized black holes can act as engines ejecting particles from their vicinity. We discuss the acceleration mechanism very near a rotating, weakly magnetized and electrically charged black hole. The role of relativistic frame-dragging is prominent within the ergosphere, where it acts on both particles and fields. A small electric charge (of the order of Wald's value) is induced on the black hole. By assuming the Kerr metric, we explore the terminal velocity and directionality of various accelerated particles. Notably, in the case of moderate misalignment between the spin axis and the global magnetic field, the interplay of rotation and induced charge increases the terminal velocity of emerging particles.