Detailed Information on Publication Record
2012
Equatorial Circular Orbits in the Kerr-Newman-de Sitter Spacetimes
PETRÁSEK, Martin and Petr SLANÝBasic information
Original name
Equatorial Circular Orbits in the Kerr-Newman-de Sitter Spacetimes
Authors
Edition
Singapore, The Twelfth Marcel Grossmann Meeting on General Relativity, p. 1917-1919, 3 pp. 2012
Publisher
World Scientific Publishing Co. Pte. Ltd.
Other information
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
978-981-4374-51-4
Keywords in English
Black holes; Cosmological constant; Particle motion
Tags
International impact
Links
MSM4781305903, plan (intention).
Changed: 15/2/2021 11:03, Mgr. Pavlína Jalůvková
Abstract
V originále
We present influence of cosmological constant on the character of geodesical equatorial circular orbits in the rotating and charged Kerr-Newman black-hole and naked singularity spacetimes. Conditions for the existence of geodesics are determined. Significant limits such as static radius and circular orbits are presented. In the Kerr-Newman-de Sitter spacetime, the existence of two static radii implies different situation in both plus- and minus-family circular orbits in comparison with the Kerr-de Sitter spacetime. Especially, in the naked singularity case, existence of so called plus-family orbits is now restricted by the rotational parameter, minus-family orbits exists not only between the outer static radius and minus-family circular photon orbit but also between the inner static radius and minus-family circular photon orbit.