Publication date: Apr 2013
Abstract:
Results of our recent studies suggest a possibility of existence of halo
(off-equatorial) electrically charged toroidal structures (thick discs)
and polar caps circling in axially symmetric backgrounds of central
objects (compact stars, black holes, etc.) endowed with electromagnetic
fields. Along with the existence of the halo structures we have also
found equatorial tori with cusps enabling outflows of matter from the
torus, without the presence of strong gravity, i.e., also in the
Newtonian regime. These phenomena represent qualitatively new
consequence of the interplay between gravity and electromagnetism, and
can provide an insight into processes determining vertical structure of
dusty tori surrounding accretion discs. Some of these results are
summarized also in the paper accepted for the publication in The
Astrophysical Journal Supplement, scheduled for the March 2013, Volume
205.
Authors:
Kovar, Jiri; Slany, P.; Karas, V.; Stuchlik, Z.;