Circular motion of neutral test particles in Reissner-Nordstr\"om spacetime
Abstract
We investigate the motion of neutral test particles in the gravitational field of a mass with charge described by the Reissner-Nordstr\"om (RN) spacetime. We focus on the study of circular stable and unstable orbits around configurations describing either black holes or naked singularities. We show that at the classical radius, defined as , there exist orbits with zero angular momentum due to the presence of repulsive gravity. The analysis of the stability of circular orbits indicates that black holes are characterized by a continuous region of stability. In the case of naked singularities, the region of stability can split into two non-connected regions inside which test particles move along stable circular orbits.
Keywords
Cite
@article{arxiv.1012.5411,
title = {Circular motion of neutral test particles in Reissner-Nordstr\"om spacetime},
author = {D. Pugliese and H. Quevedo and R. Ruffini},
journal= {arXiv preprint arXiv:1012.5411},
year = {2011}
}
Comments
23 pages, 22 figures. To be published Phys. Rev. D