文章基本信息

标题：2-A Cosmological Model with Varying G and ∧ in General Relativity
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作者：Harpreet ; R. K. Tiwari ; H. S. Sahota 等
期刊名称：Open Journal of Applied Sciences
印刷版ISSN：2165-3917
电子版ISSN：2165-3925
出版年度：2013
卷号：3
期号：1B
页码：74-78
DOI：10.4236/ojapps.2013.31B1015
出版社：Scientific Research Publishing
摘要：Spatially homogeneous and anisotropic Cosmological models play a significant role in the description of the early stages of evolution of the universe. The problem of the cosmological constant is still unsettled. The authors recently considered time dependent G and L with Bianchi type–I Cosmological model .We considered in this paper homogeneous Bianchi type -I space-time with variable G and L containing matter in the form of a perfect fluid assuming the cosmological term proportional to R^-2 (where R is scale factor). Initially the model has a point type singularity, gravitational constant G (t) is decreasing and cosmological constant L is infinite at this time. When time increases L decreases. Unlike in some earlier works we have neither assumed equation of state nor particular form of G. The model does not approach isotropy, if ‘t’ is small .The model is quasi-isotropic for large value of ‘t’.
关键词：Bianchi Type-I Universe; Varying G and ∧ ; Cosmology