Abstract
The Einstein gravitational theory and the Brans-Dicke gravitational theory are investigated for the gravitational-to-inertial mass ratio () they yield for massive systems. We examine models for stars in equilibrium but undergoing rotation or containing electromagnetic radiation. General conditions on the space-time metric of many mass sources are obtained which lead to for the massive systems. It is found that for a nonrotating star in the Brans-Dicke theory. The violation is of order for the Sun. In the Brans-Dicke theory there are also contributions to due to the radiation content of a star. This violation is of order (radiation energy)/(stellar mass), yielding a correction of about for the Sun.
- Received 17 October 1968
DOI:https://doi.org/10.1103/PhysRev.180.1293
©1969 American Physical Society