Bianchi type-I cosmological models with time dependent G and Λ

Details Bianchi type-I cosmological models with time dependent G and Λ Bianchi type-I cosmological models with time dependent G and Λ

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008ap%26ss.318..243t&link_type=abstract

Astrophysics and Space Science, Volume 318, Issue 3-4, pp. 243-247

Mathematics

Logic

5

Cosmology, Bianchi Type-I Universe, Variable Cosmological Term

Scientific paper

Einstein field equations with variable gravitational and cosmological constants are considered in the presence of perfect fluid for Bianchi type-I 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 model obtained approaches isotropy. 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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