2011/05/31 by D. Pugliese, Daniela Pugliese, Hernando Quevedo +2 · 129 citations
Physics and Astronomy · #Angular momentum #Astrophysical Phenomena and Observations #Black hole (networking) #Circular motion #Circular orbit #Classical mechanics #Gravitation #Gravitational field #Gravitational singularity #Naked singularity #Physics #Pulsars and Gravitational Waves Research #Quantum mechanics #Relativity and Gravitational Theory #Rotating black hole #Spacetime #Test particle #astro-ph.HE #gr-qc
paper · pdf · doi:10.1103/physrevd.84.044030
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 84(4) (American Physical Society) · 48 pages, 40 figures, 3 Tables. To be published PRD. This work follows the paper Phys. Rev. D Vol.83, No.2 with DOI: 10.1103/PhysRevD.83.024021 (arXiv:1012.5411v1 [astro-ph.HE]) and paper arXiv:1103.1807v3 to be published in PRD
arxiv created 2011/07/13 · openalex publication_date 2011/08/09 · arxiv updated 2011/09/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/08
We analyze the properties of circular orbits of test particles on the equatorial plane of a rotating central mass whose gravitational field is described by the Kerr spacetime. For rotating black holes and naked singularities we explore all the spatial regions where circular orbits can exist and analyze the behavior of the energy and the angular momentum of the corresponding test particles. In particular, we find all the radii at which a test particle can have zero angular momentum due to the repulsive gravity effects generated by naked singularities. We classify all the stability zones of circular orbits. It is shown that the geometric structure of the stability zones of black holes is completely different from that of naked singularities.