Vol 11, No 7 (2011) / Tiwari

Robertson-Walker cosmological models with perfect fluid in general relativity

Rishi Kumar Tiwari

Abstract

Einstein’s field equations with variable gravitational and cosmological constants are considered in the presence of perfect fluid for a Robertson-Walker universe by assuming the cosmological term to be proportional to R−m (R is a scale factor and m is a constant). A variety of solutions is presented. The physical significance of the cosmological models has also been discussed.

Keywords


cosmological parameters — cosmology: variable cosmological term

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