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Observational constraints imposed by Brans-Dicke cosmologies.Flat-space Brans-Dicke (BD) cosmologies previously found are analyzed in more detail. It is shown that the observed values of the matter density, the Hubble age, the ages of objects in the universe, the deceleration parameter, and the bound on the (unobserved) fractional time variation of the gravitational constant are too inaccurate to distinguish between the BD and Einstein-Friedmann cosmologies. An attempt is made to argue that because of the great degree of latitude in the observational constraints imposed by the BD cosmologies, efforts to improve the bound on the fractional time variation of G alone are not sufficient to rule out the BD theory.
Document ID
19730041611
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Morganstern, R. E.
(Centro de Investigacion del I.P.N. Mexico City, Mexico)
Date Acquired
August 7, 2013
Publication Date
March 15, 1973
Publication Information
Publication: Physical Review D - Particles and Fields
Subject Category
Space Sciences
Accession Number
73A26413
Funding Number(s)
CONTRACT_GRANT: NSR-09-051-001
Distribution Limits
Public
Copyright
Other

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