文章基本信息

标题：Polytropic Bulk Viscous Cosmological Model with Variable G and Λ
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作者：R. K. Tiwari ; Mukesh Sharma ; Sonia Sharma 等
期刊名称：Open Access Library Journal
印刷版ISSN：2333-9705
电子版ISSN：2333-9721
出版年度：2014
卷号：1
期号：5
页码：1-8
DOI：10.4236/oalib.1100729
语种：English
出版社：Scientific Research Pub
摘要：We consider a Bianchi type-I Polytropic bulk viscous fluid cosmological model with variable G and Λ. To get a deterministic model, it is assumed that and , , , where is the pressure, ρ is the energy density, η is the coefficient of bulk viscosity, α, k, γ and ηo are constants, H is Hubble constant, where k1 > 0, k2 > 0. The solution obtained lead to inflationary phase and the results obtained match with the observations [31] [32]. The case n = 1 for α = 1 is also discussed, relating the results with the observations.
关键词：Bianchi Type-I Space TimeBulk ViscosityShear ScalarExpansion Scalar