The post-Newtonian limit in C-theories of gravitation

Details The post-Newtonian limit in C-theories of gravitation The post-Newtonian limit in C-theories of gravitation

2011-09-21

arxiv.org/abs/1109.4585v2

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

5 pages, no figures; To appear in PRD as a rapid communication

Scientific paper

C-theory provides a unified framework to study metric, metric-affine and more general theories of gravity. In the vacuum weak-field limit of these theories, the parameterized post-Newtonian (PPN) parameters $\beta$ and $\gamma$ can differ from their general relativistic values. However, there are several classes of models featuring long-distance modifications of gravity but nevertheless passing the Solar system tests. Here it is shown how to compute the PPN parameters in C-theories and also in nonminimally coupled curvature theories, correcting previous results in the literature for the latter.

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