Journal
PHYSICAL REVIEW D
Volume 85, Issue 8, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.85.084016
Keywords
-
Funding
- Spanish Grant [FIS2008-06078-C03-02]
- Consolider Programme CPAN [CSD2007-00042]
- RGC of the government of the Hong Kong SAR
- Fundacao para a Ciencia e Tecnologia [PTDC/FIS/102742/2008, CERN/FP/116398/2010]
Ask authors/readers for more resources
We present a novel approach to modified theories of gravity which consists of adding to the Einstein-Hilbert Lagrangian an f(R) term constructed a la Palatini. Using the respective dynamically equivalent scalar-tensor representation, we show that the theory can pass the Solar System observational constraints even if the scalar field is very light. This implies the existence of a long-range scalar field, which is able to modify the cosmological and galactic dynamics but leaves the Solar System unaffected. We also verify the absence of instabilities in perturbations and provide explicit models which are consistent with local tests and lead to the late-time cosmic acceleration.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available