Reconstruction of a scalar-tensor theory of gravity in an accelerating universe
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 along with the present density of dustlike matter from 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 omega(-1).
Boisseau
B
Laboratoire de Mathematique et Physique Theorique, UPRES-A 6083 CNRS, Universite de Tours, Parc de Grandmont, F 37200 Tours, France.
Esposito-Farese
G
Polarski
D
Starobinsky
AA