Reconstruction of a Scalar-Tensor Theory of Gravity in an Accelerating Universe

B. Boisseau; G. Esposito-Farèse; D. Polarski; A. A. Starobinsky

doi:10.1103/PhysRevLett.85.2236

Reconstruction of a Scalar-Tensor Theory of Gravity in an Accelerating Universe

B. Boisseau, G. Esposito-Farèse, D. Polarski, and A. A. Starobinsky

Phys. Rev. Lett. 85, 2236 – Published 11 September 2000

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 $ω^{- 1}$ .

Received 21 January 2000

DOI:https://doi.org/10.1103/PhysRevLett.85.2236

Authors & Affiliations

B. Boisseau¹, G. Esposito-Farèse^2,3, D. Polarski^1,3, and A. A. Starobinsky^4,5

¹Laboratoire de Mathématique et Physique Théorique, UPRES-A 6083 CNRS, Université de Tours, Parc de Grandmont, F 37200 Tours, France
²Centre de Physique Théorique, CNRS Luminy, Case 907, F 13288 Marseille Cedex 9, France
³Département d'Astrophysique Relativiste et de Cosmologie, Observatoire de Paris-Meudon, F 92195 Meudon Cedex, France
⁴Landau Institute for Theoretical Physics, 117334 Moscow, Russia
⁵Newton Institute for Mathematical Sciences, University of Cambridge, Cambridge CB3 0EH, United Kingdom