Constraining f(R) Gravity as a Scalar Tensor Theory

Details Constraining f(R) Gravity as a Scalar Tensor Theory Constraining f(R) Gravity as a Scalar Tensor Theory

2006-12-20

arxiv.org/abs/astro-ph/0612569v1

Phys.Rev.D76:063505,2007

Astronomy and Astrophysics

Astrophysics

15 pages, 5 figures

Scientific paper

10.1103/PhysRevD.76.063505

We search for viable f(R) theories of gravity, making use of the equivalence between such theories and scalar-tensor gravity. We find that models can be made consistent with solar system constraints either by giving the scalar a high mass or by exploiting the so-called chameleon effect. However, in both cases, it appears likely that any late-time cosmic acceleration will be observationally indistinguishable from acceleration caused by a cosmological constant. We also explore further observational constraints from, e.g., big bang nucleosynthesis and inflation.

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