Cosmological tests of modified gravity: constraints on $F(R)$ theories from the galaxy clustering ratio - CEA - Commissariat à l’énergie atomique et aux énergies alternatives Accéder directement au contenu
Article Dans Une Revue Physical Review D Année : 2015

Cosmological tests of modified gravity: constraints on $F(R)$ theories from the galaxy clustering ratio

Julien Bel
  • Fonction : Auteur
  • PersonId : 752966
  • IdHAL : julien-bel
Philippe Brax
  • Fonction : Auteur
  • PersonId : 830764
Patrick Valageas
  • Fonction : Auteur
  • PersonId : 834493

Résumé

The clustering ratio $\eta$, a large-scale structure observable originally devised to constrain the shape of the power spectrum of matter density fluctuations, is shown to provide a sensitive and model independent probe of the nature of gravity in the cosmological regime. We apply this analysis to $F(R)$ theories of gravity using the luminous red galaxy sample extracted from the Sloan Digital Sky Survey. We find that the absolute amplitude of deviations from GR, $f_{R_0 }$, is constrained to be smaller than $3 \times 10^{-6}$ at the 1$\sigma$ confidence level. This bound, improving by an order of magnitude on current constraints, makes cosmological probes of gravity competitive with Solar system tests.

Dates et versions

cea-01068693 , version 1 (26-09-2014)

Identifiants

Citer

Julien Bel, Philippe Brax, Christian Marinoni, Patrick Valageas. Cosmological tests of modified gravity: constraints on $F(R)$ theories from the galaxy clustering ratio. Physical Review D, 2015, 91 (10), pp.103503. ⟨10.1103/PhysRevD.91.103503⟩. ⟨cea-01068693⟩
162 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More