## [1109.4585] The post-Newtonian limit in C-theories of gravitation

Authors: Tomi S. Koivisto

Date: 21 Sep 2011

Abstract: 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.

#### Sep 22, 2011

1109.4585 (/preprints)
2011-09-22, 17:13