Tuesday, May 15, 2012

1205.2698 (Elise Jennings et al.)

Redshift space distortions in f(R) gravity    [PDF]

Elise Jennings, Carlton M. Baugh, Baojiu Li, Gong-Bo Zhao, Kazuya Koyama
We use large volume, high resolution N-body simulations to predict the clustering of dark matter in redshift space in f(R) modified gravity cosmologies. This is the first time that the nonlinear matter and velocity fields have been resolved to such a high level of accuracy over a broad range of scales in this class of models. We find significant deviations from the clustering signal in standard gravity, with an enhanced boost in power on large scales and stronger damping on small scales in the f(R) models compared to GR at redshifts z<1. We measure the velocity divergence (P_\theta \theta) and matter (P_\delta \delta) power spectra and find a large deviation in the ratios \sqrt{P_\theta \theta/P_\delta \delta} and P_\delta \theta/P_\delta\delta, between the f(R) models and GR for 0.03View original: http://arxiv.org/abs/1205.2698

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