Publication date: Mar 2013
Abstract:
A Newtonian model of non-conductive, charged, perfect fluid tori
orbiting in combined spherical gravitational and dipolar magnetic fields
is presented and stationary, axisymmetric toroidal structures are
analyzed. Matter in such tori exhibits a purely circulatory motion and
the resulting convection carries charges into permanent rotation around
the symmetry axis. As a main result, we demonstrate the possible
existence of off-equatorial charged tori and equatorial tori with cusps
that also enable outflows of matter from the torus in the Newtonian
regime. These phenomena qualitatively represent a new consequence of the
interplay between gravity and electromagnetism. From an astrophysical
point of view, our investigation can provide insight into processes that
determine the vertical structure of dusty tori surrounding accretion
disks.
Authors:
Slaný, P.; Kovář, J.; Stuchlík, Z.; Karas, V.;