Some Robertson-Walker models with time dependent <Emphasis Type="Italic">G</Emphasis> and Λ |
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| Authors: | R K Tiwari |
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| Institution: | (1) Department of Mathematics, Govt. Model Science College, Rewa, MP, India |
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| Abstract: | Einstein field equations with variable gravitational and cosmological constants are considered in the presence of perfect
fluid for Robertson-Walker universe by assuming the cosmological term proportional to the Hubble parameter. This variation
law for vacuum density has recently been proposed by Schützhold on the basis of quantum field estimations in the curved and
expanding background. The cosmological term tends asymptotically to a genuine cosmological constant and the model tends to
a deSitter universe. We obtain that the present universe is accelerating with a large fraction of cosmological density in
the form of cosmological term. |
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| Keywords: | Cosmology R-W universe Variable cosmological term |
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