SLANÝ, Petr and Zdeněk STUCHLÍK. Basic Properties of Toroidal Structures in Kerr-de Sitter Backgrounds. In Albert Einstein Century International Conference. United States of America: American Institute of Physics, 2006, p. "A32", 1 pp. ISBN 978-0-7354-0359-8. Available from: https://dx.doi.org/10.1063/1.2399656.
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Basic information
Original name Basic Properties of Toroidal Structures in Kerr-de Sitter Backgrounds
Authors SLANÝ, Petr and Zdeněk STUCHLÍK.
Edition United States of America, Albert Einstein Century International Conference, p. "A32", 1 pp. 2006.
Publisher American Institute of Physics
Other information
Original language English
Type of outcome Proceedings paper
Field of Study 10308 Astronomy
Confidentiality degree is not subject to a state or trade secret
Organization unit Faculty of Philosophy and Science in Opava
ISBN 978-0-7354-0359-8
Doi http://dx.doi.org/10.1063/1.2399656
Keywords in English cosmological constant, black holes, naked singularities, toroidal structures
Tags sbornik, UF
Tags International impact
Links MSM4781305903, plan (intention).
Changed by Changed by: Mgr. Pavlína Jalůvková, učo 25213. Changed: 18/12/2020 11:15.
Abstract
Perfect fluid tori with uniform distribution of the specific angular momentum orbiting the Kerr-de Sitter black holes or naked singularities are studied. Closed equipotential surfaces corresponding to stationary toroidal discs are allowed only in the spacetimes admitting stable circular geodesics. The last closed surface crosses itself in the cusp(s) enabling outflow(s) of matter from the torus due to the violation of hydrostatic equilibrium. The repulsive cosmological constant implies the existence ofthe outer cusp (with a stabilizing effect on the tori because of excretion, i.e., outflow of matter from the torus into the outer space) and the strong collimation of open equipotential surfaces along the rotational axis. Both the effects take place nearby so-called static radius where the gravitational attraction is just balanced by the cosmic repulsion.
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