Reconstruction of a scalar-tensor theory of gravity in an accelerating universe

Details Reconstruction of a scalar-tensor theory of gravity in an accelerating universe Reconstruction of a scalar-tensor theory of gravity in an accelerating universe

2000-01-21

arxiv.org/abs/gr-qc/0001066v1

Phys.Rev.Lett. 85 (2000) 2236

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages, LaTeX 2.09, REVTeX 3.0, two-column format

Scientific paper

10.1103/PhysRevLett.85.2236

The present acceleration of the Universe strongly indicated by recent observational data can be modeled in the scope of a scalar-tensor theory of gravity. We show that it is possible to determine the structure of this theory (the scalar field potential and the functional form of the scalar-gravity coupling) along with the present density of dustlike matter from the following two observable cosmological functions: the luminosity distance and the linear density perturbation in the dustlike matter component as functions of redshift. Explicit results are presented in the first order in the small inverse Brans-Dicke parameter 1/omega.

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