Horizons in Robinson-Trautman space-times

Details Horizons in Robinson-Trautman space-times Horizons in Robinson-Trautman space-times

2008-05-26

arxiv.org/abs/0805.3978v2

Class.Quant.Grav.25:195012,2008

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

11p

Scientific paper

10.1088/0264-9381/25/19/195012

The past quasi-local horizons in vacuum Robinson-Trautman spacetimes are described. The case of a null (non-expanding) horizon is discussed. It is shown that the only Robinson-Trautman space-time admitting such a horizon with sections diffeomorphic to S_2 is the Schwarzschild space-time. Weakening this condition leads to the horizons of the C-metric. Properties of the hypersurface r=2m for finite retarded time u are examined.

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