TY - JOUR

T1 - Equilibrium configurations from gravitational collapse

AU - Joshi, Pankaj S.

AU - Malafarina, Daniele

AU - Narayan, Ramesh

N1 - Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.

PY - 2011/12/7

Y1 - 2011/12/7

N2 - We develop here a new procedure within Einsteins theory of gravity to generate equilibrium configurations that result as the final state of gravitational collapse from regular initial conditions. As a simplification, we assume that the collapsing fluid is supported only by tangential pressure. We show that the equilibrium geometries generated by this method form a subset of static solutions to the Einstein equations, and that they can either be regular or develop a naked singularity at the center. When a singularity is present, there are key differences in the properties of stable circular orbits relative to those around a Schwarzschild black hole with the same mass. Therefore, if an accretion disk is present around such a naked singularity it could be observationally distinguished from a disk around a black hole.

AB - We develop here a new procedure within Einsteins theory of gravity to generate equilibrium configurations that result as the final state of gravitational collapse from regular initial conditions. As a simplification, we assume that the collapsing fluid is supported only by tangential pressure. We show that the equilibrium geometries generated by this method form a subset of static solutions to the Einstein equations, and that they can either be regular or develop a naked singularity at the center. When a singularity is present, there are key differences in the properties of stable circular orbits relative to those around a Schwarzschild black hole with the same mass. Therefore, if an accretion disk is present around such a naked singularity it could be observationally distinguished from a disk around a black hole.

UR - http://www.scopus.com/inward/record.url?scp=81255200248&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=81255200248&partnerID=8YFLogxK

U2 - 10.1088/0264-9381/28/23/235018

DO - 10.1088/0264-9381/28/23/235018

M3 - Article

AN - SCOPUS:81255200248

VL - 28

JO - Classical and Quantum Gravity

JF - Classical and Quantum Gravity

SN - 0264-9381

IS - 23

M1 - 235018

ER -