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

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

sbornik, UF

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.
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