Spherical Photon Orbit around a Kerr-Newman Black Hole
A. S. Alam (a), B. N. Jayawiguna (b), H. S. Ramadhan (c)

Department of Physics, Faculty of Mathematics and Natural Sciences, University of Indonesia, Depok 16424, Indonesia.
a) agya.sewara01[at]ui.ac.id
b) byon.nugraha91[at]ui.ac.id
c) hramad[at]sci.ui.ac.id

Abstract

It is well-known that, since azimuthal symmetry is broken for rotating black hole, the corresponding orbit is not confined to an equatorial plane. Recently there have been studies on the spherical photon orbit for Kerr black. In this paper, we investigate the spherical photon orbits around a rotating charged black hole (Kerr-Newman) and see how the charge alters the classifications of orbits. The analytic solutions of the geodesics equation are derived and several orbital paths are shown.

Keywords: Geodesics- Equatorial plane- Kerr Newmann Black hole

Topic: Physics