2000/01/21 by B. Boisseau, G. Esposito-Farese, D. Polarski +1
Physics and Astronomy · #gr-qc #astro-ph
paper · pdf · doi:10.1103/physrevlett.85.2236
published as Phys.Rev.Lett. 85 (2000) 2236 · 4 pages, LaTeX 2.09, REVTeX 3.0, two-column format
arxiv created 2000/01/21 · arxiv updated 2009/11/30
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.