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
Stať ve sborníku
Field of Study
10308 Astronomy
Confidentiality degree
není předmětem státního či obchodního tajemství
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).
Změněno: 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.