Solar System constraints to nonminimally coupled gravity

• Type: Article in International Scientific Journal
• Date: 2013

Authors

Orfeu Bertolami (Author) FCUP; Riccardo March (Author) Other; Jorge Páramos (Author) Other

Journal

Title: Physical Review D: Particles and fields

Vol. 88

Initial page: 064019

ISSN: 0556-2821

Publisher: American Physical Society

Indexing

ISI Web of Knowledge - 28 Citations

Scopus - 30 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

CORDIS: Physical sciences > Physics > Relativity

Other information

Authenticus ID: P-006-7BX

DOI: 10.1103/PhysRevD.88.064019

Abstract (EN): We extend the analysis of Chiba et al. [Phys. Rev. D 75, 124014 (2007)] of Solar System constraints on f(R) gravity to a class of nonminimally coupled (NMC) theories of gravity. These generalize f(R) theories by replacing the action functional of general relativity with a more general form involving two functions f1(R) and f2(R) of the Ricci scalar curvature R. While the function f1(R) is a nonlinear term in the action, analogous to f(R) gravity, the function f2(R) yields a NMC between the matter Lagrangian density Lm and the scalar curvature. The developed method allows for obtaining constraints on the admissible classes of functions f1(R) and f2(R), by requiring that predictions of NMC gravity are compatible with Solar System tests of gravity. Then we consider a NMC model which accounts for the observed accelerated expansion of the Universe and we show that such a model cannot be constrained by the present method.

Language: Portuguese

Type (Professor's evaluation): Scientific