Role of electric charge in shaping equilibrium configurations of fluid tori encircling black holes

0365019 - ASÚ 2012 RIV US eng J - Journal Article
Kovář, J. - Slaný, P. - Stuchlík, Z. - Karas, Vladimír - Cremaschini, C. - Miller, J. C.
Role of electric charge in shaping equilibrium configurations of fluid tori encircling black holes.
Physical Review D: Particles, Fields, Gravitation and Cosmology. Roč. 84, č. 8 (2011), 084002/1-084002/14. ISSN 1550-7998
R&D Projects: GA MŠMT(CZ) LC06014; GA ČR GA205/07/0052
Institutional research plan: CEZ:AV0Z10030501
Keywords : black holes
Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics
Impact factor: 4.558, year: 2011

Following our previous studies of charged test particles and uncharged perfect fluid tori encircling compact objects, we introduce here a simple test model of a charged perfect fluid torus in strong gravitational and electromagnetic fields. In contrast to ideal magnetohydrodynamic models, we consider here the opposite limit of negligible conductivity, where the charges are tied completely to the moving matter. This is an extreme limiting case which can provide a useful reference against which to compare subsequent more complicated astrophysically motivated calculations. To clearly demonstrate the features of our model, we construct three-dimensional axisymmetric charged toroidal configurations around Reissner-Nordström black holes and compare them with equivalent configurations of electrically neutral tori.
Permanent Link: http://hdl.handle.net/11104/0200361