Perfect fluid Bianchi type-I cosmological models with time varying G and Λ

被引：27

作者：

Singh, J. P. ^{[1
]}

Tiwari, R. K. ^{[2
]}

机构：

[1] APS Univ, Dept Math Sci, Rewa 486003, India

[2] Govt Model Sci Coll, Dept Math, Rewa 486001, India

来源：

PRAMANA-JOURNAL OF PHYSICS | 2008年 / 70卷 / 04期

关键词：

Bianchi type-i Universe; varying G and Lambda; cosmology;

D O I：

10.1007/s12043-008-0019-y

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Bianchi Type-I cosmological models containing perfect fluid with time varying G and A have been presented. The solutions obtained represent an expansion scalar theta bearing a constant ratio to the anisotropy in the direction of space-like unit vector lambda(i). Of the two models obtained, one has negative vacuum energy density, which decays numerically. In this model, we obtain Lambda similar to H-2, Lambda similar to R-44/R and Lambda similar to T-2 (T is the cosmic time) which is in accordance with the main dynamical laws for the decay of Lambda. The second model reduces to a static solution with repulsive gravity.

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收藏

页码：565 / 574

页数：10

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