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Circular motion of neutral test particles in Reissner-Nordström spacetime

Daniela Pugliese*, Hernando Quevedo†, and Remo Ruffini‡

  • Dipartimento di Fisica, Università di Roma La Sapienza, Piazzale Aldo Moro 5, I-00185 Roma, Italy
  • ICRANet, Piazzale della Repubblica 10, I-65122 Pescara, Italy

  • *daniela.pugliese@icra.it
  • †On sabbatical leave from Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México. quevedo@nucleares.unam.mx
  • ‡ruffini@icra.it
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Phys. Rev. D 83, 024021 – Published 18 January, 2011

DOI: https://doi.org/10.1103/PhysRevD.83.024021

Abstract

We investigate the motion of neutral test particles in the gravitational field of a mass M with charge Q described by the Reissner-Nordström (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 Q2/M, 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 nonconnected regions inside which test particles move along stable circular orbits.

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See Also

Motion of charged test particles in Reissner-Nordström spacetime

Daniela Pugliese, Hernando Quevedo, and Remo Ruffini
Phys. Rev. D 83, 104052 (2011)

Equatorial circular motion in Kerr spacetime

Daniela Pugliese, Hernando Quevedo, and Remo Ruffini
Phys. Rev. D 84, 044030 (2011)

Equatorial circular orbits of neutral test particles in the Kerr-Newman spacetime

Daniela Pugliese, Hernando Quevedo, and Remo Ruffini
Phys. Rev. D 88, 024042 (2013)

Article Text

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Outline

Information

Phys. Rev. D 83, 024021– Published 18 January, 2011
  • Received 9 November 2010

© 2011 American Physical Society

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