J 2024

Light escape cones in the locally nonrotating reference frames of the Kerr-de Sitter superspinars and related superspinar shadows

CHARBULÁK, Daniel and Zdeněk STUCHLÍK

Basic information

Original name

Light escape cones in the locally nonrotating reference frames of the Kerr-de Sitter superspinars and related superspinar shadows

Authors

CHARBULÁK, Daniel (203 Czech Republic, belonging to the institution) and Zdeněk STUCHLÍK (203 Czech Republic, belonging to the institution)

Edition

Physical Review D, 2024, 2470-0010

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

Impact factor

Impact factor: 5.000 in 2022

Organization unit

Institute of physics in Opava

DOI

http://dx.doi.org/10.1103/PhysRevD.110.124050

UT WoS

001386383200005

Keywords in English

M87 event horizon; equatorial circular orbits;telescope results VI;black-hole;cosmological constant;naked singularities;photon motion;in-field;particles;dust

Tags

RIV25

Tags

International impact, Reviewed
Změněno: 12/2/2025 10:22, Mgr. Pavlína Jalůvková

Abstract

V originále

The construction of local escape cones and their complementary cones, related to the locally nonrotating frames (LNRFs) orbiting superspinars with the external field described by the Kerr-de Sitter (KdS) naked singularity (NS) spacetimes, is described for all possible classes of the KdS NS spacetimes and all possible positions of the photon emitter. The notion of the local escape cones is then applied to construct the shadow of the KdS superspinars related to the distant static observers represented by the LNRFs located near the so-called static radius where the spacetime is close to the asymptotically flat region of the Kerr spacetimes. The shadow construction is focused on the KdS superspinars limited by the cosmological and astrophysical restrictions on the spacetime parameters, namely, the superspinar dimensionless spin and the dimensionless cosmological parameter relating the cosmological constant and the superspinar's mass.
Displayed: 12/2/2025 23:10