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Viscous fluid cosmology with a cosmological constant

被引：5
|
作者：
Singh, C. P. [1 ]
Kumar, Suresh [1 ]
机构：
[1] Delhi Coll Engn, Dept Appl Math, Delhi 110042, India
来源：
ASTROPHYSICS AND SPACE SCIENCE | 2009年 / 323卷 / 04期
关键词：
Hubble parameter; Deceleration parameter; Cosmological constant; Viscous fluid; HUBBLE-SPACE-TELESCOPE; BULK VISCOSITY; LAMBDA-TERM; I UNIVERSE; DARK ENERGY; MODELS; SUPERNOVAE; DECELERATION; CONSTRAINTS; ENTROPY;
D O I：
10.1007/s10509-009-0137-0
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Exact solutions of the field equations for a Bianchi type-I space-time, filled with a viscous fluid and cosmological constant, are obtained. We utilize the constancy of deceleration parameter to get singular and non-singular solutions. We investigate a number of solutions with constant and time-varying cosmological constant together with a linear relation between shear viscosity and expansion scalar. Due to dissipative processes, the mean anisotropy and shear of the model tend to zero at a faster rate.
引用
收藏
页码：407 / 414
页数：8
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