Bianchi type- I, III, V, VIo and Kantowski-Sachs models in scalar-tensor theories with dynamic cosmological constant

Details Bianchi type- I, III, V, VIo and Kantowski-Sachs models in scalar-tensor theories with dynamic cosmological constant Bianchi type- I, III, V, VIo and Kantowski-Sachs models in scalar-tensor theories with dynamic cosmological constant

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008ap%26ss.318..231s&link_type=abstract

Astrophysics and Space Science, Volume 318, Issue 3-4, pp. 231-236

Mathematics

Logic

2

Bianchi Type Universe, Dynamic Cosmological Constant, Scalar-Tensor Theory

Scientific paper

The effect of a time-dependent cosmological constant is considered in a family of scalar-tensor theories. The Bianchi type I, III, V, VIo and Kantowski-Sachs models for vacuum and perfect fluid matter are found. The gravitational constant decreases with time so that these models satisfy the Dirac hypothesis. The “cosmological constant” also decreases with time, therefore it can have a very small value at the present time.

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