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Title:
Cluster constraints on f(R) gravity
Authors:
Schmidt, Fabian; Vikhlinin, Alexey; Hu, Wayne
Affiliation:
AA(Kavli Institute for Cosmological Physics, Department of Astronomy & Astrophysics, and Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA), AB(Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138, USA, and Space Research Institute, Moscow, Russia), AC(Kavli Institute for Cosmological Physics, Department of Astronomy & Astrophysics, and Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA)
Publication:
Physical Review D, vol. 80, Issue 8, id. 083505 (PhRvD Homepage)
Publication Date:
10/2009
Origin:
APS
PACS Keywords:
Cosmology, Modified theories of gravity, Dark energy
DOI:
10.1103/PhysRevD.80.083505
Bibliographic Code:
2009PhRvD..80h3505S

Abstract

Modified gravitational forces in models that seek to explain cosmic acceleration without dark energy typically predict deviations in the abundance of massive dark matter halos. We conduct the first, simulation calibrated, cluster abundance constraints on a modified gravity model, specifically the modified action f(R) model. The local cluster abundance, when combined with geometric and high redshift data from the cosmic microwave background, supernovae, H0, and baryon acoustic oscillations, improves previous constraints by nearly 4 orders of magnitude in the field amplitude. These limits correspond to a 2 order of magnitude improvement in the bounds on the range of the force modification from the several Gpc scale to the tens of Mpc scale.
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