期刊
CZECHOSLOVAK JOURNAL OF PHYSICS
卷 54, 期 4, 页码 487-498出版社
INST PHYSICS ACAD SCI CZECH REPUBLIC
DOI: 10.1023/B:CJOP.0000020586.43735.b5
关键词
cosmology; variable cosmological constant; viscous-fluid models; early universe
Some LRS Bianchi type V viscous-fluid cosmological models are investigated, in which the coefficient of shear viscosity is considered as proportional to the scale of expansion in the model. This leads to A = B-n, where A and B are metric potentials, n being a constant. The coefficient of bulk viscosity is also assumed to be a power function of mass density. The cosmological constant is found to be a decreasing function of time, which is supported by results from recent type la supernovae observations. Some physical aspects of the models are also discussed.
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