D 2012

Equatorial Circular Orbits in the Kerr-Newman-de Sitter Spacetimes

PETRÁSEK, Martin and Petr SLANÝ

Basic information

Original name

Equatorial Circular Orbits in the Kerr-Newman-de Sitter Spacetimes

Authors

PETRÁSEK, Martin and Petr SLANÝ

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

sbornik, UF

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.
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