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

Details Note on the Evolution of the Gravitational Potential in Rastall Scalar Field Theories Note on the Evolution of the Gravitational Potential in Rastall Scalar Field Theories

2011-09-09

arxiv.org/abs/1109.2096v2

Physics Letters B Volume 711, Issues 3-4, 15 May 2012, Pages 232-237

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

16 pages, 3 figures, Sections 2 and 5 enlarged, accepted for publication in Physics Letters B

Scientific paper

10.1016/j.physletb.2012.04.020

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 $\gamma \neq 1$.

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