Constraints on scalar-tensor theories from observations

Details Constraints on scalar-tensor theories from observations Constraints on scalar-tensor theories from observations

2011-12-30

arxiv.org/abs/1201.0080v1

Phys. Rev. D 84, 124045 (2011)

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

16 pages, 32 figures

Scientific paper

We study the dynamical description of scalar-tensor gravity by performing the best-fit analysis for two cases of exponential and power-law form of the potential and scalar field function coupled to the curvature. The models are then tested against observational data. The results show that in both scenarios the Universe undergoes an acceleration expansion period and the geometrical equivalent of dark energy is associated with a time-dependent equation of state.

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