Journal ArticleDOI
Bimetric gravitation theory on a cosmological basis.
Nathan Rosen,Nathan Rosen +1 more
TLDR
In this article, the background metric tensor is chosen on the basis of a model of the universe, in accordance with the perfect cosmological principle, it is taken as describing a space-time of constant curvature.Abstract:
In the bimetric theory of gravitation the background metric tensor γ
μν
, previously taken as describing flat space-time, is now chosen on the basis of a model of the universe. In accordance with the perfect cosmological principle, it is taken as describing a space-time of constant curvature. There are three possible forms, corresponding tok=0, 1, −1. Only fork=1 (a closed universe) does the model not go through a singular state; hence this is the appropriate choice. The isotropic solution of the field equations can be chosen to agree with the present cosmological observations. For small systems like the solar system the theory gives the same results as before, in agreement with those of general relativity.read more
Citations
More filters
Journal ArticleDOI
Modified Gravity and Cosmology
TL;DR: A comprehensive survey of recent work on modified theories of gravity and their cosmological consequences can be found in this article, where the authors provide a reference tool for researchers and students in cosmology and gravitational physics, as well as a selfcontained, comprehensive and up-to-date introduction to the subject as a whole.
Modied Gravity and Cosmology
TL;DR: A comprehensive survey of recent work on modied theories of gravity and their cosmological consequences can be found in this article, where the authors provide a reference tool for researchers and students in cosmology and gravitational physics, as well as a selfcontained, comprehensive and up-to-date introduction to the subject as a whole.
Journal ArticleDOI
Testing the gravitational interaction in the field of the Earth via satellite laser ranging and the Laser Ranged Satellites Experiment (LARASE)
D. Lucchesi,D. Lucchesi,D. Lucchesi,L. Anselmo,Massimo Bassan,Massimo Bassan,Carmen Pardini,Roberto Peron,Roberto Peron,Giuseppe Pucacco,Giuseppe Pucacco,M. Visco,M. Visco +12 more
TL;DR: The Laser Ranged Satellites Experiment (LARASE) as discussed by the authors is a research program that aims to perform new refined tests and measurements of gravitation in the field of the Earth in the weak field and slow motion (WFSM) limit of general relativity (GR).
Journal ArticleDOI
Absolute Objects and Counterexamples: Jones-Geroch Dust, Torretti Constant Curvature, Tetrad-Spinor, and Scalar Density
TL;DR: In this article, Torretti's example involving constant curvature spaces is shown to have an absolute object on Anderson's analysis, i.e., the conformal spatial metric density.
Journal ArticleDOI
Magnetized cosmological models in bimetric theory of gravitation
Shivdas D. Katore,R. S. Rane +1 more
TL;DR: In this paper, the Bianchi type-III magnetized cosmological model when the field of gravitation is governed by either a perfect fluid or cosmic string is investigated in Rosen's [1] bimetric theory of gravity.
References
More filters
Journal ArticleDOI
A theory of gravitation
TL;DR: In this article, a theory of gravitation satisfying the covariance and equivalence principles is presented, which makes use of a Riemannian metric tensor gμν describing the true gravitational field, and a flat-space metric tensors γμν, describing the inertial forces.
Journal ArticleDOI
The redshift-distance relation. VIII. Magnitudes and redshifts of southern galaxies in groups: A further mapping of the local velocity field and an estimate of q$sub 0$
TL;DR: In this article, a subset of the material: multiplets, groups, and clusters of E and S0 galaxies is used to test again the isotropy of the Hubble expansion.
Journal ArticleDOI
Gravitational Constant: Experimental Bound on Its Time Variation
Journal ArticleDOI
Relativistic gravity in the solar system. II - Anisotropy in the Newtonian gravitational constant
TL;DR: Relativistic gravity in solar system, predicting Newtonian gravitational constant anisotropy measurements by Cavendish experiments as mentioned in this paper, has been shown to be a good fit for the Cavendish experiment.