Approximately self-similar critical collapse in 2+1 dimensions

Details Approximately self-similar critical collapse in 2+1 dimensions Approximately self-similar critical collapse in 2+1 dimensions

2004-04-07

arxiv.org/abs/gr-qc/0404033v2

Phys.Rev. D70 (2004) 044010

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

5 pages, 2 figures, REVTeX style. Minor changes to match the version accepted for publication in PRD

Scientific paper

10.1103/PhysRevD.70.044010

Critical collapse of a self-gravitating scalar field in a (2+1)-dimensional spacetime with negative cosmological constant seems to be dominated by a continuously self-similar solution of the field equations without cosmological constant. However, previous studies of linear perturbations in this background were inconclusive. We extend the continuously self-similar solutions to solutions of the field equations with negative cosmological constant, and analyse their linear perturbations. The extended solutions are characterized by a continuous parameter. A suitable choice of this parameter seems to improve the agreement with the numerical results. We also study the dynamics of the apparent horizon in the extended background.

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