Year: 2000
Type: article
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).
Source: Physical Review Letters
Institutions: Université de Tours, Centre National de la Recherche Scientifique, Laboratoire de Mathématiques et Physique Théorique, Observatoire de Paris, Centre de Physique Théorique, Isaac Newton Institute for Mathematical Sciences, Landau Institute for Theoretical Physics, University of Cambridge
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2156404110