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

@article{46142,
   author = {Schee, Jan and Stuchlík, Zdeněk},
   article_location = {SG - Singapurská republika},
   article_number = {2},
   doi = {http://dx.doi.org/10.1142/S0218271815500200},
   keywords = {regular spacetimes; circular geodesics; profiled lines},
   language = {eng},
   issn = {0218-2718},
   journal = {International Journal of Modern Physics D},
   title = {Circular geodesic of Bardeen and Ayon-Beato-Garcia regular black-hole and no-horizon spacetimes},
   url = {https://www.worldscientific.com/doi/10.1142/S0218271815500200},
   volume = {24},
   year = {2015}
}

TY  - JOUR
ID  - 46142
AU  - Schee, Jan - Stuchlík, Zdeněk
PY  - 2015
TI  - Circular geodesic of Bardeen and Ayon-Beato-Garcia regular black-hole and no-horizon spacetimes
JF  - International Journal of Modern Physics D
VL  - 24
IS  - 2
SP  - "1550020-1"-"1550020-31"
EP  - "1550020-1"-"1550020-31"
SN  - 02182718
KW  - regular spacetimes
KW  - circular geodesics
KW  - profiled lines
UR  - https://www.worldscientific.com/doi/10.1142/S0218271815500200
N2  - 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
ER  - 

SCHEE, Jan a Zdeněk STUCHLÍK. Circular geodesic of Bardeen and Ayon-Beato-Garcia regular black-hole and no-horizon spacetimes. \textit{International Journal of Modern Physics D}. SG - Singapurská republika, roč.~24, č.~2, s.~''1550020-1''-''1550020-31'', 31 s. ISSN~0218-2718. doi:10.1142/S0218271815500200. 2015.