Publication date: Aug 2014
Abstract:
We study charged-fluid toroidal structures surrounding a nonrotating
charged black hole immersed in a large-scale, asymptotically uniform
magnetic field. In continuation of our former study on electrically
charged matter in approximation of zero conductivity, we demonstrate the
existence of orbiting structures in permanent rigid rotation in the
equatorial plane and charged clouds hovering near the symmetry axis. We
constrain the range of parameters that allow stable configurations and
derive the geometrical shape of equipressure surfaces. Our simplified
analytical study suggests that these regions of stability may be
relevant for trapping electrically charged particles and dust grains in
some areas of the black hole magnetosphere and thus important in some
astrophysical situations.
Authors:
Kovář, Jiří; Slaný, Petr; Cremaschini, Claudio; Stuchlík, Zdeněk; Karas, Vladimír; Trova, Audrey;