A cosmological limit on the possible variation of G

Details A cosmological limit on the possible variation of G A cosmological limit on the possible variation of G

Sep 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978mnras.184..677b&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 184, Sept. 1978, p. 677-682. Research supported by the Lindemann Trust.

Other

42

Abundance, Astronomical Models, Cosmology, Gravitational Constant, Light Elements, Deuterium, Gravitational Fields, Helium Isotopes, Newton Theory, Nuclear Fusion, Time Dependence

Scientific paper

The observed light-element abundances in the universe of X(He-4) = 25% (+7%, -3%) and X(D) of the order of 0.001% interpreted within the framework of the standard big-bang theory are used to limit possible temporal evolution in the Newton gravitational 'constant', G, to a maximum absolute value of approximately (1.5 + or - 0.7) x 10 to the -12th power per yr. This limit is nearly two orders of magnitude stronger than that obtained by Shapiro (1974) using direct-radar ranging techniques. This result may be used to rule out and severely constrain proposed theories of gravity in which G is allowed to evolve in time. Examples are given, and it is indicated how a similar method could considerably improve the limits upon allowed variations in other fundamental 'constants'.

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