A Rastall Scalar-Tensor theory

2015/03/17 by Thiago R. P. Caramês, Caramês, T., M. H. Daouda J. C. Fabris +7
Physics and Astronomy · Earth and Planetary Sciences · #Cosmology and Gravitation Theories #Black Holes and Theoretical Physics #Geophysics and Gravity Measurements

paper · pdf · doi:10.48550/arxiv.1503.04882

Abstract

We formulate a theory combining the principles of a scalar-tensor gravity and the Rastall proposal of a violation of the usual conservation laws. In the resulting Brans-Dicke-Rastall (BDR) theory the only exact, static, spherically symmetric solution is a Robinson-Bertotti type solution besides the trivial Schwarzschild one. The PPN constraints can be completely satisfied for some values of the free parameters.The cosmological solutions display, among others, a decelerate-accelerate transition in the matter dominated phase.

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