Current status of modified gravity

Lotfi Boubekeur, Elena Giusarma, Olga Mena, and Héctor Ramírez
Phys. Rev. D 90, 103512 – Published 11 November 2014

Abstract

We revisit the cosmological viability of the Hu-Sawicki modified gravity scenario. The impact of such a modification on the different cosmological observables, including gravitational waves, is carefully described. The most recent cosmological data, as well as constraints on the relationship between the clustering parameter σ8 and the current matter mass-energy density Ωm from cluster number counts and weak lensing tomography, are considered in our numerical calculations. The strongest bound we find is |fR0|<3.7×106 at 95% C.L. Forthcoming cluster surveys covering 10000deg2 in the sky, with galaxy surface densities of O(10)arcmin2 could improve the precision in the σ8-Ωm relationship, tightening the above constraint.

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  • Received 4 August 2014

DOI:https://doi.org/10.1103/PhysRevD.90.103512

© 2014 American Physical Society

Authors & Affiliations

Lotfi Boubekeur1,2, Elena Giusarma3, Olga Mena1, and Héctor Ramírez1

  • 1Instituto de Física Corpuscular (IFIC), CSIC-Universitat de Valencia, Apartado de Correos 22085, E-46071 Valencia, Spain
  • 2Laboratoire de Physique Mathématique et Subatomique (LPMS), Université de Constantine I, Constantine 25000, Algeria
  • 3Physics Department and INFN, Università di Roma “La Sapienza”, Ple Aldo Moro 2, 00185 Rome, Italy

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Issue

Vol. 90, Iss. 10 — 15 November 2014

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