Violation of the Carter-Israel conjecture and its astrophysical implications

Abstract

On the basis of the Carter-Israel conjecture, today we believe that some compact and massive objects in the Galaxy and in the Universe are Kerr black holes. However, this idea cannot yet be confirmed by observations. We can currently obtain reliable estimates of the masses of these objects, but we do not know if the space-time around them is described by the Kerr metric and if they have an event horizon. A fundamental limit for a Kerr black hole is the Kerr bound $|a_{\ast }|\le 1$. Here I discuss some astrophysical implications associated with the violation of this bound, which can thus be used to test the Carter-Israel conjecture.

arXiv comment8 pages, 6 figures. To appear in the proceedings of "NEB 14: Recent Developments in Gravity" (Ioannina, Greece, 8 - 11 June 2010)

References in corpus (19)

• PLUTO: a Numerical Code for Computational Astrophysics
• The Maximum Mass of a Neutron Star
• Naked Singularities in Spherically Symmetric Inhomogeneous Tolman-Bondi Dust Cloud Collapse
• Apparent shape of super-spinning black holes
• Over-spinning a black hole with a test body
• Black Holes in Astrophysics
• Dynamical Constraints On Alternatives To Massive Black Holes In Galactic Nuclei
• Accretion Processes On a Black Hole
• Astrophysical Violations of the Kerr Bound as a Possible Signature of String Theory
• On the Occurrence of Naked Singularity in Spherically Symmetric Gravitational Collapse
• Quantization of heterotic strings in a Goedel/Anti de Sitter spacetime and chronology protection
• Black holes as antimatter factories
• Accretion process onto super-spinning objects
• Three-Dimensional Hydrodynamic Simulations of Accretion Tori in Kerr Spacetimes
• Gravitational collapse and naked singularities
• Supertube domain-walls and elimination of closed time-like curves in string theory
• Outflows from accreting super-spinars
• Observational Testability of Kerr bound in X-ray Spectrum of Black-Hole Candidates
• Classical and Quantum Analysis of Repulsive Singularities in Four Dimensional Extended Supergravity

Cited by in corpus (3)

• Testing the Kerr black hole hypothesis
• Wormhole Cosmic Censorship
• The repulsive nature of naked singularities from the point of view of Quantum Mechanics