Lucas Lombriser, Fabian Schmidt, Tobias Baldauf, Rachel Mandelbaum, Uros Seljak, Robert E. Smith
We present a new test of gravitational interactions at the r\simeq(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<3.5x10^-3 at
the 1D-marginalized 95% confidence level. We also constrain the amplitude F_0
of a phenomenological fit modeled 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 f_R0=0 and F_0=0 are consistent with the lensing measurements
at the 68% confidence level.
View original:
http://arxiv.org/abs/1111.2020
No comments:
Post a Comment