2011/12/31 by Anirban Chowdhury, Anirban N. Chowdhury, Mandar Patil +2 · 2 citations
Mathematics · Physics and Astronomy · #Accretion (finance) #Astrophysical Phenomena and Observations #Astrophysics #Astrophysics and Cosmic Phenomena #Black hole (networking) #Curvature #General relativity #Geodesic #Geometry #Gravitational singularity #Kerr metric #Mathematical physics #Mathematics #Metric (unit) #Naked singularity #Physics #Pulsars and Gravitational Waves Research #Quantum mechanics #Schwarzschild metric #Schwarzschild radius #Theoretical physics #astro-ph.HE #gr-qc
paper · pdf · doi:10.1103/physrevd.85.104031
published as Phys. Rev. D 85, 104031 (2012) · 13 pages, 16 figures, version accepted for publication by PRD
arxiv created 2012/04/19 · openalex publication_date 2012/05/21 · arxiv updated 2012/06/20 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study here circular timelike geodesics in the Janis-Newman-Winicour and Gamma metric spacetimes which contain a strong curvature naked singularity and reduce to the Schwarzschild metric for a specific value of one of the parameters. We show that for both the metrics the range of allowed parameters can be divided into three regimes where structure of the circular geodesics is qualitatively different. It follows that the properties of the accretion disks around such naked singularities can be significantly different from those of disks around black holes. This adds to previous studies showing that if naked singularities exist in nature, their observational signature would be significantly different from that of the black hole.