Detailed Information on Publication Record
2015
Circular geodesic of Bardeen and Ayon-Beato-Garcia regular black-hole and no-horizon spacetimes
SCHEE, Jan and Zdeněk STUCHLÍKBasic information
Original name
Circular geodesic of Bardeen and Ayon-Beato-Garcia regular black-hole and no-horizon spacetimes
Authors
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:
Organization unit
Faculty of Philosophy and Science in Opava
UT WoS
000349637600012
Keywords in English
regular spacetimes; circular geodesics; profiled lines
Tags
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