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|<3.7×10-6 at 95% C.L. Forthcoming cluster surveys covering 10000deg2 in the sky, with galaxy surface densities of O(10)arcmin-2 could improve the precision in the σ8-Ωm relationship, tightening the above constraint.
|Número de artículo
|Physical Review D - Particles, Fields, Gravitation and Cosmology
|Publicada - 11 nov. 2014
|Publicado de forma externa