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has been cited by the following article:

• 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.