Black hole formation from collapsing dust fluid in a background of dark energy

Rong-Gen Cai and Anzhong Wang
Phys. Rev. D 73, 063005 – Published 13 March 2006

Abstract

The gravitational collapse of a spherically symmetric star, made of a dust fluid, ρDM, in a background of dark energy, p=wρ (w<1/3) is studied. It is found that when only dark energy is present, black holes are never formed. When both of them are present, black holes can be formed, due to the condensation of the dust fluid. Initially the dust fluid may not play an important role, but, as time increases, it will dominate the collapse and finally lead to formation of black holes. This result remains true even when the interaction between the dust fluid and dark energy does not vanish. When w<1 (phantoms), some models also can be interpreted as representing the death of a white hole that ejects both dust and phantoms. The ejected matter recollapses to form a black hole.

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  • Received 2 May 2005

DOI:https://doi.org/10.1103/PhysRevD.73.063005

©2006 American Physical Society

Authors & Affiliations

Rong-Gen Cai1 and Anzhong Wang2

  • 1Institute of Theoretical Physics, Chinese Academy of Sciences, P.O. Box 2735, Beijing 100080, China
  • 2CASPER, Physics Department, Baylor University, 101 Bagby Avenue, Waco, Texas 76706, USA

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Issue

Vol. 73, Iss. 6 — 15 March 2006

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