TIMELIKE GEODESICS AROUND A CHARGED SPHERICALLY SYMMETRIC DILATON BLACK HOLE

Serbian Astronomical Journal

article

C. Blaga¹ 

[1] Faculty of Mathematics and Computer Science, Babe¸s-Bolyai University Cluj-Napoca Kog˘alniceanu Street 1

关键词: black hole physics;    gravitation;    relativistic processes;   

DOI  :  10.2298/SAJ1590041B

来源: Astronomical Observatory, Department of Astronomy, Belgrade

【 摘 要 】

In this paper we study the timelike geodesics around a spherically symmetric charged dilaton black hole. The trajectories around the black hole are classified using the effective potential of a free test particle. This qualitative approach enables us to determine the type of orbit described by test particle without solving the equations of motion, if the parameters of the black hole and the particle are known. The connections between these parameters and the type of orbit described by the particle are obtained. To visualize the orbits we solve numerically the equation of motion for different values of parameters envolved in our analysis. The effective potential of a free test particle looks different for a non-extremal and an extremal black hole, therefore we have examined separately these two types of black holes.

【 授权许可】

CC BY-NC-ND