J 2015

Circular geodesic of Bardeen and Ayon-Beato-Garcia regular black-hole and no-horizon spacetimes

SCHEE, Jan and Zdeněk STUCHLÍK

Basic information

Original name

Circular geodesic of Bardeen and Ayon-Beato-Garcia regular black-hole and no-horizon spacetimes

Authors

SCHEE, Jan and Zdeněk STUCHLÍK

Edition

International Journal of Modern Physics D, SG - Singapurská republika, 2015, 0218-2718

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

www

Organization unit

Faculty of Philosophy and Science in Opava

DOI

http://dx.doi.org/10.1142/S0218271815500200

UT WoS

000349637600012

Keywords in English

regular spacetimes; circular geodesics; profiled lines

Tags

UF

Tags

International impact, Reviewed

Links

GB14-37086G, research and development project.
Změněno: 27/1/2021 11:46, Mgr. Pavlína Jalůvková

Abstract

V originále

In this paper, we study circular geodesic motion of test particles and photons in the Bardeen and Ayon-Beato-Garcia (ABG) geometry describing spherically symmetric regular black-hole or no-horizon spacetimes. While the Bardeen geometry is not exact solution of Einstein's equations, the ABG spacetime is related to self-gravitating charged sources governed by Einstein's gravity and nonlinear electrodynamics. They both are characterized by the mass parameter m and the charge parameter g. We demonstrate that in similarity to the Reissner-Nordstrom (RN) naked singularity spacetimes an anti-gravity static sphere should exist in all the no-horizon Bardeen and ABG solutions that can be surrounded by a Keplerian accretion disc. However, contrary to the RN nakedsingularity spacetimes, the ABG no-horizon spacetimes with parameter g/m > 2 can contain also an additional inner Keplerian disc hidden under the static anti-gravity sphere. Properties of the geodesic structure are reflected by simple ob
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