Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...212..602g&link_type=abstract
Astrophysical Journal, Part 1, vol. 212, Mar. 15, 1977, p. 602-604.
Astronomy and Astrophysics
Astrophysics
6
Cosmology, Field Theory (Physics), Gravitation Theory, Space-Time Functions, Astronomical Models, Astrophysics, Gravitational Constant, Metric Space, Relativity
Scientific paper
In the framework of the bimetric theory of gravitation, a homogeneous isotropic cosmological model is set up having negative spatial curvature (k = -1) and containing matter having negligible pressure. The solutions of the field equations are obtained as expansions in powers of a small parameter, the present value of which can be determined, in principle, from observational data. It appears that its order of magnitude is such that the PPN parameter considered by Lee et al. (1976) is small enough to make the bimetric theory viable. The rate of change with time of the gravitational constant is found to be considerably smaller than the present estimated upper limit.
Goldman Itzhak
Rosen Nathan
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