TITLE:
Motion of a Test Particle in the Kerr-Newman De/Anti De Sitter Space-Time
AUTHORS:
Shanjit Heisnam, Irom Ablu Meitei, Kangujam Yugindro Singh
KEYWORDS:
Geodesic Equations, Kerr-Newman De/Anti De Sitter Black Hole, Inner and Outer Event Horizons, Stable Circular Orbits
JOURNAL NAME:
International Journal of Astronomy and Astrophysics,
Vol.4 No.2,
June
4,
2014
ABSTRACT: In this paper we obtain
the geodesic equations of motion of a test particle (charged particle and
photon) in the Kerr-Newman de/anti de Sitter black hole by using the
Hamilton-Jacobi equation. We determine the positions of the inner, outer and
cosmological horizons of the black hole. In terms of the effective potentials,
the trajectory of the test particle within the inner horizon is studied. It
appears that there are stable circular orbits of a charged particle and photon
within the inner horizon and that the combined effect of the charge and
rotation of the Kerr-Newman de/anti de Sitter black hole and the coupling between
the charge of the test particle and the electromagnetic field of the black hole
may account for this.