Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2001-03-08
Ninth Marcel Grossmann Meeting on General Relativity, Proceedings (V. G. Gurzadyan, R. T. Jantzen, R. Ruffini, eds.), World Sc
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
TEX, 2 pages. Texte of a communication presented at the 9th Marcel Grossmann Meeting, Roma, July 2000. Submitted to the Procee
Scientific paper
That preferred-frame theory accounts for special relativity and reduces to it if the gravitation field cancels. Starting from an interpretation of gravity as a pressure force, it is based on just one scalar field. This scalar gives the relation between the flat "background" metric and the curved "physical" metric, due to an equivalence principle between the absolute effects of motion and gravitation. The scalar is also a potential for the gravity acceleration vector. Motion is governed by an extension of the special-relativistic form of Newton's second law. This provides a new equation for continuum dynamics, that gives the gravitational modification of Maxwell's equations, consistent with photon dynamics. The same effects on light rays as in GR are predicted at the post-Newtonian approximation (PNA). An asymptotic PNA is being studied, in order to build a consistent celestial mechanics in the theory. The cosmic acceleration is predicted and nonsingular cosmological models are obtained.
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