A causal model of radiating stellar collapse

Details A causal model of radiating stellar collapse A causal model of radiating stellar collapse

1997-10-31

arxiv.org/abs/astro-ph/9710360v1

Class.Quant.Grav. 15 (1998) 323

Astronomy and Astrophysics

Astrophysics

Latex [ioplppt style] 9 pages; to appear Class. Quantum Grav

Scientific paper

10.1088/0264-9381/15/2/007

We find a simple exact model of radiating stellar collapse, with a shear-free and non-accelerating interior matched to a Vaidya exterior. The heat flux is subject to causal thermodynamics, leading to self-consistent determination of the temperature $T$. We solve for $T$ exactly when the mean collision time $\tau_{c}$ is constant, and perturbatively in a more realistic case of variable $\tau_{c}$. Causal thermodynamics predicts temperature behaviour that can differ significantly from the predictions of non-causal theory. In particular, the causal theory gives a higher central temperature and greater temperature gradient.

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