On existence of halo orbits in Kerr?Newman spacetimes

@inproceedings{44202,
   author = {Stuchlík, Zdeněk and Karas, Vladimír and Kovář, Jiří},
   address = {Opava},
   booktitle = {Proceedings of RAGtime 8/9: Workshops on black holes and neutron stars},
   keywords = {Kerr-Newman spacetime, black hole, naked singularity, charged particle, magnetic field, halo orbits},
   language = {eng},
   location = {Opava},
   isbn = {978-80-7248-419-5},
   pages = {125-138},
   publisher = {Slezská univerzita v Opavě, Filozoficko-přírodovědecká fakulta, Ústav fyziky},
   title = {On existence of halo orbits in Kerr?Newman spacetimes},
   year = {2007}
}

TY  - JOUR
ID  - 44202
AU  - Stuchlík, Zdeněk - Karas, Vladimír - Kovář, Jiří
PY  - 2007
TI  - On existence of halo orbits in Kerr?Newman spacetimes
PB  - Slezská univerzita v Opavě, Filozoficko-přírodovědecká fakulta, Ústav fyziky
CY  - Opava
SN  - 9788072484195
KW  - Kerr-Newman spacetime, black hole, naked singularity, charged particle, magnetic field, halo orbits
N2  - Being inspired by existence of non-equatorial circular (halo) stable orbits of charged particles in composite of gravitational, dipole magnetic and co-rotational electric fields near some planets, we find possible existence of these orbits in strong gravitational fields described by the Kerr?Newman geometry. By using the general relativistic inertial forces formalism combined with the effective potential approach, we show that the stable halo orbits do exist there. But it seems that they are out of theastrophysical importance, being hidden under the inner black-hole horizon, or appearing in the naked singularity spacetimes.
ER  - 

STUCHLÍK, Zdeněk, Vladimír KARAS and Jiří KOVÁŘ. On existence of halo orbits in Kerr?Newman spacetimes. In \textit{Proceedings of RAGtime 8/9: Workshops on black holes and neutron stars}. Opava: Slezská univerzita v Opavě, Filozoficko-přírodovědecká fakulta, Ústav fyziky, 2007, p.~125-138. ISBN~978-80-7248-419-5.