Homogeneous anisotropic cosmological models with variable gravitational and cosmological ``Constants''

Details Homogeneous anisotropic cosmological models with variable gravitational and cosmological ``Constants'' Homogeneous anisotropic cosmological models with variable gravitational and cosmological ``Constants''

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993ijtp...32.1041s&link_type=abstract

International Journal of Theoretical Physics, Volume 32, Issue 6, pp.1041-1059

Physics

9

Scientific paper

The Einstein field equations with perfect fluid source and variable Λ and G for Bianchi-type universes are studied under the assumption of a power-law time variation of the expansion factor, achieved via a suitable power-law assumption for the Hubble parameter suggested by M. S. Berman. All the models have a power-law variation of pressure and density and are singular at the epoch t=0. The variation of G( t) as 1 /t and Λ( t) as 1 /t 2 is consistent with these models.

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