Geodesic Structure of Test Particle in Bardeen Spacetime

Details Geodesic Structure of Test Particle in Bardeen Spacetime Geodesic Structure of Test Particle in Bardeen Spacetime

2011-12-27

arxiv.org/abs/1112.5909v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

13 pages 35 figures

Scientific paper

The Bardeen model describes a regular space-time, i.e. a singularity-free black hole space-time. In this paper, by analyzing the behavior of the effective potential for the particles and photons, we investigate the time-like and null geodesic structures in the space-time of Bardeen model. At the same time, all kinds of orbits, which are allowed according to the energy level corresponding to the effective potentials, are numerically simulated in detail. We find many-world bound orbits, two-world escape orbits and escape orbits in this spacetime. We also find that bound orbits precession directions are opposite and their precession velocities are different, the inner bound orbits shift along counter-clockwise with high velocity while the exterior bound orbits shift along clockwise with low velocity.

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