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Cluster density profiles as a test of modified gravity

Title
Cluster density profiles as a test of modified gravity
Authors
Lombriser L.Schmidt F.Baldauf T.Mandelbaum R.Seljak U.Smith R.E.
Ewha Authors
Uros Seljak
Issue Date
2012
Journal Title
Physical Review D - Particles, Fields, Gravitation and Cosmology
ISSN
1550-7998JCR Link
Citation
Physical Review D - Particles, Fields, Gravitation and Cosmology vol. 85, no. 10
Indexed
SCI; SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
We present a new test of gravitational interactions at the r≃(0.2-20)Mpc scale, around the virial radius of dark matter halos measured through cluster-galaxy lensing of maxBCG clusters from the Sloan Digital Sky Survey (SDSS). We employ predictions from self-consistent simulations of f(R) gravity to find an upper bound on the background field amplitude of

f R0

<3.5×10 -3 at the 1D-marginalized 95% confidence level. As a model-independent assessment of the constraining power of cluster profiles measured through weak gravitational lensing, we also constrain the amplitude F 0 of a phenomenological modification based on the profile enhancement induced by f(R) gravity when not including effects from the increased cluster abundance in f(R). In both scenarios, dark-matter-only simulations of the concordance model corresponding to

=0 and F 0=0 are consistent with the lensing measurements, i.e., at the 68% and 95% confidence level, respectively. © 2012 American Physical Society.
DOI
10.1103/PhysRevD.85.102001
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자연과학대학 > 물리학전공 > Journal papers
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