2023
Stationary observers in Kerr-de Sitter spacetimes
PETRÁSEK, Martin; Jiří KOVÁŘ and Zdeněk STUCHLÍKBasic information
Original name
Stationary observers in Kerr-de Sitter spacetimes
Authors
PETRÁSEK, Martin (203 Czech Republic, belonging to the institution); Jiří KOVÁŘ (203 Czech Republic, belonging to the institution) and Zdeněk STUCHLÍK (203 Czech Republic, belonging to the institution)
Edition
International Journal of Modern Physics D, SG - Singapurská republika, 2023, 0218-2718
Other information
Language
English
Type of outcome
Article in a journal
Field of Study
10308 Astronomy
Country of publisher
Singapore
Confidentiality degree
is not subject to a state or trade secret
References:
Impact factor
Impact factor: 1.800
RIV identification code
RIV/47813059:19630/23:A0000279
Organization unit
Institute of physics in Opava
UT WoS
001077432500001
EID Scopus
2-s2.0-85173250623
Keywords in English
Stationary observerKerr-de Sitter spacetime;orbital velocity;inertial force;black hole;naked singularity
Tags
International impact, Reviewed
Changed: 12/2/2024 09:58, Mgr. Pavlína Jalůvková
Abstract
In the original language
In this paper, we present a study of basic classes of stationary observers orbiting in stationary and axially symmetric Kerr-de Sitter spacetimes. Along with proper definitions of these classes, we focus on their possible matching on particular circular orbits. Especially, we determine a number of such orbits in a given spacetime characterized by its rotational and cosmological parameters that leads to a comprehensive classification of the Kerr-de Sitter spacetimes. Studied profiles of orbital velocities of the observers and of forces keeping them on their orbits directly reflect complex structure of the Kerr-de Sitter spacetimes that is caused by a unique interplay of attraction and rotation of a central object and an ambient cosmic repulsion.