J 2020

Equatorial circular orbits in Kerr-Newman-de Sitter spacetimes

SLANÝ, Petr and Zdeněk STUCHLÍK

Basic information

Original name

Equatorial circular orbits in Kerr-Newman-de Sitter spacetimes

Authors

SLANÝ, Petr (203 Czech Republic, belonging to the institution) and Zdeněk STUCHLÍK (203 Czech Republic, belonging to the institution)

Edition

European Physical Journal C, 2020, 1434-6044

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10303 Particles and field physics

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

RIV identification code

RIV/47813059:19630/20:A0000072

Organization unit

Institute of physics in Opava

DOI

UT WoS

000546247100011

Keywords in English

MOTION; KERR-(ANTI); SUPERNOVAE; EVOLUTION; FIELD

Tags

Tags

International impact, Reviewed
Změněno: 23/3/2021 22:30, Mgr. Pavlína Jalůvková

Abstract

V originále

Circular motion of test particles in the equatorial plane of the Kerr-Newman-de Sitter (KNdS) spacetime is analyzed for both black-hole and naked-singularity backgrounds. We present relations for specific energy, specific angular momentum and Keplerian angular velocity of a particle on equatorial circular orbit, and discuss criteria for the existence of such orbits giving limits on spacetime parameters. The orientation of motion along circular orbits is discussed from the point of view of locally non-rotating frames. Finally, we discuss the stability of circular motion against radial perturbations and determine limits on the existence of stable circular orbits, as well as the structure of stability regions in KNdS spacetimes.