Marginally stable thick discs orbiting the Kerr-de Sitter black holes: the mass estimates

Details Marginally stable thick discs orbiting the Kerr-de Sitter black holes: the mass estimates Marginally stable thick discs orbiting the Kerr-de Sitter black holes: the mass estimates

Apr 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007iaus..238..449s&link_type=abstract

Black Holes from Stars to Galaxies -- Across the Range of Masses. Edited by V. Karas and G. Matt. Proceedings of IAU Symposium #

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Scientific paper

Properties of equipotential surfaces in test perfect fluid tori with uniform distribution of the specific angular momentum orbiting KdS black holes will be summarized. The last closed surface crosses itself in the cusp(s) enabling outflow(s) of matter from the torus. The repulsive (positive) cosmological constant is responsible for the existence of the outer cusp (with a stabilizing effect on the tori because of the excretion) and strong collimation of open equipotential surfaces along the rotational axis. We shall present the mass estimates for tori with an adiabatic equation of state enabling to put limits on their central mass density, for which the approximation of test fluid is adequate.

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