Publication date: Aug 2015
Abstract:
We present results of our study of charged-fluid toroidal structures
surrounding a non-rotating black hole surrounded by a dipole and
large-scale, asymptotically uniform magnetic fields. In continuation of
our former study of electrically charged matter in approximation of zero
conductivity, we demonstrate the existence of orbiting structures in the
equatorial plane, levitating above it and those hovering near the
symmetry axis. We constrain the range of black-hole, magnetic fields and
matter parameters that allow stable configurations of the fluid
structures and derive the geometrical shape of equi-pressure surfaces,
characterizing the temperature and other astrophysical characteristic
profiles. 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, being
thus important in some astrophysical situations.
Authors:
Kovar, Jiri; Slany, Petr; Stuchlik, Zdenek; Karas, Vladimir;