Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
1998-11-17
Phys.Lett. A255 (1999) 213-220
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
no figures, revtex
Scientific paper
10.1016/S0375-9601(99)00181-4
The spherical gravitational collapse of a compact packet consisting of perfect fluid is studied. The spacetime outside the fluid packet is described by the out-going Vaidya radiation fluid. It is found that when the collapse has continuous self-similarity the formation of black holes always starts with zero mass, and when the collapse has no self-similarity, the formation of black holes always starts with a finite non-zero mass. The packet is usually accompanied by a thin matter shell. The effects of the shell on the collapse are also studied.
Santos Nilton O.
Villas da Rocha Jaime F.
Wang Anzhong
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