Reconstruction of a Scalar-Tensor Theory of Gravity in an Accelerating Universe
B. BoisseauLaboratoire de Mathématique et Physique Théorique, UPRES-A 6083 CNRS, Université de Tours, Parc de Grandmont, F 37200 Tours, FranceGilles Esposito-FarèseCentre de Physique Théorique, CNRS Luminy, Case 907, F 13288 Marseille Cedex 9, FranceDavid PolarskiDépartement d'Astrophysique Relativiste et de Cosmologie, Observatoire de Paris-Meudon, F 92195 Meudon Cedex, FranceAlexei A. StarobinskyUniversity of Cambridge
2000en
ABI
Abstract
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).
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