The claimed star solution is a spatially flat FLRW universe whose scale factor grows like sqrt(cosh(2kt)); its late-time de Sitter phase has Lambda=3k^2, not k^2.
The role of shear in dissipative gravitational collapse
1 Pith paper cite this work. Polarity classification is still indexing.
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abstract
In this paper we investigate the physics of a radiating star undergoing dissipative collapse in the form of a radial heat flux. Our treatment clearly demonstrates how the presence of shear affects the collapse process; we are in a position to contrast the physical features of the collapsing sphere in the presence of shear with the shear-free case. By employing a causal heat transport equation of the Maxwell-Cattaneo form we show that the shear leads to an enhancement of the core temperature thus emphasizing that relaxational effects cannot be ignored when the star leaves hydrostatic equilibrium.
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On a star with expanding isotropic fluid
The claimed star solution is a spatially flat FLRW universe whose scale factor grows like sqrt(cosh(2kt)); its late-time de Sitter phase has Lambda=3k^2, not k^2.