Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2004-10-04
Phys.Rev.D70:084004,2004
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
Some misprints in eqs.(38) and (39) corrected
Scientific paper
10.1103/PhysRevD.70.084004
The Misner and Sharp approach to the study of gravitational collapse is extended to the dissipative case in, both, the streaming out and the diffusion approximations. The role of different terms in the dynamical equation are analyzed in detail. The dynamical equation is then coupled to a causal transport equation in the context of Israel--Stewart theory. The decreasing of the inertial mass density of the fluid, by a factor which depends on its internal thermodynamics state, is reobtained, at any time scale. In accordance with the equivalence principle, the same decreasing factor is obtained for the gravitational force term. Prospective applications of this result to some astrophysical scenarios are discussed.
Herrera Luis
Santos Nilton O.
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