Dynamics of viscous dissipative gravitational collapse: A full causal approach

Details Dynamics of viscous dissipative gravitational collapse: A full causal approach Dynamics of viscous dissipative gravitational collapse: A full causal approach

2008-04-22

arxiv.org/abs/0804.3584v2

Int.J.Mod.Phys.D18:129-145,2009

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

22 pages Latex. To appear in Int. J. Mod. Phys. D. Typos corrected

Scientific paper

10.1142/S0218271809014285

The Misner and Sharp approach to the study of gravitational collapse is extended to the viscous dissipative case in, both, the streaming out and the diffusion approximations. The dynamical equation is then coupled to causal transport equations for the heat flux, the shear and the bulk viscosity, in the context of Israel--Stewart theory, without excluding the thermodynamics viscous/heat coupling coefficients. The result is compared with previous works where these later coefficients were neglected and viscosity variables were not assumed to satisfy causal transport equations. Prospective applications of this result to some astrophysical scenarios are discussed.

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