Exact non-equilibrium solutions of the Einstein-Boltzmann equations .2.

被引:3
作者
Wolvaardt, FP [1 ]
Maartens, R [1 ]
机构
[1] UNIV NATAL,DEPT MATH,ZA-4001 DURBAN,SOUTH AFRICA
关键词
D O I
10.1088/0264-9381/14/2/026
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We find exact solutions of the Einstein-Boltzmann equations with relaxational collision term in FRW and Bianchi H spacetimes. The kinematic and thermodynamic properties of the solutions are investigated. We give an exact expression for the bulk viscous pressure of a FRW distribution that relaxes towards collision-dominated equilibrium. If the relaxation is toward collision-free equilibrium, the bulk viscosity vanishes-but there is still entropy production. The Bianchi I solutions have zero heat flux and bulk viscosity, but non-zero shear viscosity. The solutions are used to construct a realization of the Weyl curvature hypothesis.
引用
收藏
页码:535 / 547
页数:13
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