Equatorial Circular Orbits in the Kerr-Newman-de Sitter Spacetimes

@inproceedings{46860,
   author = {Petrásek, Martin and Slaný, Petr},
   address = {Singapore},
   booktitle = {The Twelfth Marcel Grossmann Meeting on General Relativity},
   keywords = {Black holes; Cosmological constant; Particle motion},
   language = {eng},
   location = {Singapore},
   isbn = {978-981-4374-51-4},
   pages = {1917-1919},
   publisher = {World Scientific Publishing Co. Pte. Ltd.},
   title = {Equatorial Circular Orbits in the Kerr-Newman-de Sitter Spacetimes},
   year = {2012}
}

TY  - JOUR
ID  - 46860
AU  - Petrásek, Martin - Slaný, Petr
PY  - 2012
TI  - Equatorial Circular Orbits in the Kerr-Newman-de Sitter Spacetimes
PB  - World Scientific Publishing Co. Pte. Ltd.
CY  - Singapore
SN  - 9789814374514
KW  - Black holes
KW  - Cosmological constant
KW  - Particle motion
N2  - We present influence of cosmological constant on the character of geodesical equatorial circular orbits in the rotating and charged Kerr-Newman black-hole and naked singularity spacetimes. Conditions for the existence of geodesics are determined. Significant limits such as static radius and circular orbits are presented. In the Kerr-Newman-de Sitter spacetime, the existence of two static radii implies different situation in both plus- and minus-family circular orbits in comparison with the Kerr-de Sitter spacetime. Especially, in the naked singularity case, existence of so called plus-family orbits is now restricted by the rotational parameter, minus-family orbits exists not only between the outer static radius and minus-family circular photon orbit but also between the inner static radius and minus-family circular photon orbit.
ER  - 

PETRÁSEK, Martin a Petr SLANÝ. Equatorial Circular Orbits in the Kerr-Newman-de Sitter Spacetimes. In \textit{The Twelfth Marcel Grossmann Meeting on General Relativity}. Singapore: World Scientific Publishing Co. Pte. Ltd., 2012, s.~1917-1919. ISBN~978-981-4374-51-4.