Possible time variations of G in scalar-tensor theories of gravity

Details Possible time variations of G in scalar-tensor theories of gravity Possible time variations of G in scalar-tensor theories of gravity

2002-08-13

arxiv.org/abs/gr-qc/0208028v1

Grav.Cosmol.Suppl. 8N2 (2002) 18-21

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Latex2e, 4 pages

Scientific paper

We estimate the possible variations of the gravitational constant G in the framework of a generalized (Bergmann-Wagoner-Nordtvedt) scalar-tensor theory of gravity on the basis of the field equations, without using their special solutions. Specific estimates are essentially related to the values of other cosmological parameters (the Hubble and acceleration parameters, the dark matter density etc.), but the values of G-dot/G compatible with modern observations do not exceed 10^{-12}.

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