Reconstruction of a Scalar-Tensor Theory of Gravity in an Accelerating Universe
2000; American Physical Society; Volume: 85; Issue: 11 Linguagem: Inglês
10.1103/physrevlett.85.2236
ISSN1092-0145
AutoresB. Boisseau, Gilles Esposito-Farèse, David Polarski, Alexei A. Starobinsky,
Tópico(s)Solar and Space Plasma Dynamics
ResumoThe 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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