Publication date: Sep 2011
Abstract:
Results of our recent studies suggest a possibility of existence of halo
(off-equatorial) clouds consisting of non-interacting charged test
particles encircling compact objects (black holes, neutron stars)
surrounded by magnetic fields. Here we upgrade the basic model of such
diluted toroidal structures by adding internal properties of the matter
like density and pressure, so that we have more feasible description for
the real charged matter. We realize it by using the magnetohydrodynamic
approach. Namely, we built a model of dielectric (zero conductivity)
charged torus moving in strong gravitational and electromagnetic fields
in the vicinity of black holes. This approach represents just the
opposite one to that of widely used ideal magnetohydrodynamics, where
the infinite conductivity is taken into account. However, the zero (or
negligible) conductivity seems to be one of the assumptions for the
existence of charged tori circling in strong gravitational and
electromagnetic fields of compact objects.
Authors:
Kovar, Jiri; Slany, P.; Stuchlik, Z.; Karas, V.; Cremaschini, C.; Miller, J.;