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Plane Symmetric Viscous Fluid Cosmological Models with Varying <Emphasis Type="Italic">Λ</Emphasis>-Term |
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| Authors: | Anirudh Pradhan Purnima Pandey Kanti Jotania Mahesh Kumar Yadav |
| Institution: | (1) Department of Mathematics, Hindu Post-graduate College, Zamania, 232 331, Ghazipur, India;(2) Department of Physics, Faculty of Science, The M.S. University of Baroda, Vadodara, 390 002, Gujarat, India;(3) Department of Mathematics, Sobhasaria Engineering College, NH-11, Sikar, 332 001, India |
| Abstract: | Plane symmetric viscous fluid cosmological models of the universe with a variable cosmological term are investigated. The viscosity coefficient of bulk viscous fluid is assumed to be a power function of mass density whereas the coefficient of shear viscosity is to be proportional to rate of expansion in the model. We have also obtained a special model in which the shear viscosity is assumed to be zero. The cosmological constant Λ is found to be a decreasing function of time and a positive which is supported by results from recent supernovae Ia observations. Some physical and geometric properties of the models are also discussed. |
| Keywords: | Cosmology Viscous models Variable cosmological term |
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