Horizons in 2+1-dimensional collapse of particles

Details Horizons in 2+1-dimensional collapse of particles Horizons in 2+1-dimensional collapse of particles

2007-07-12

arxiv.org/abs/0707.1877v1

Pramana69:,2007

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

10 pages, 5 figures

Scientific paper

10.1007/s12043-007-0113-6

A simple, geometrical construction is given for three-dimensional spacetimes with negative cosmological constant that contain two particles colliding head-on. Depending on parameters like particle masses and distance, the combined geometry will the that of a particle, or of a black hole. In the black hole case the horizon is calculated. It is found that that the horizon typically starts at a point and spreads into a closed curve with corners, which propagate along spacelike caustics and disappear as the horizon passes the particles.

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