1109.2096 (J. C. Fabris et al.)

Note on the Evolution of the Gravitational Potential in Rastall Scalar
Field Theories    [PDF]

J. C. Fabris, M. Hamani Daouda, O. F. Piattella

We investigate the evolution of the gravitational potential in Rastall scalar field theories. In a single component model a consistent perturbation theory, formulated in the newtonian gauge, is possible only for $\gamma = 1$, which is the General Relativity limit. On the other hand, the addition of another canonical fluid component allows also to consider the case $\gamma \neq 1$.

View original: http://arxiv.org/abs/1109.2096