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• W2150269787 abstract "The growth rate of matter density perturbations has been measured from redshift-space distortion (RSD) in the galaxy power spectrum. We constrain the model parameter space for representative modified gravity models to explain the dark energy problem, by using the recent data of ${f}_{m}(z){ensuremath{sigma}}_{8}(z)$ at the redshifts $z=0.06--0.8$ measured by WiggleZ, SDSS LRG, BOSS, and 6dFGRS. We first test the Hu-Sawicki's $f(R)$ dark energy model, and find that only the parameter region close to the standard $ensuremath{Lambda}$ cold dark matter model is allowed ($ensuremath{lambda}>12$ and 5 for $n=1.5$ and 2, respectively, at 95% C.L.). We then investigate the covariant Galileon model with a de Sitter attractor and show that the parameter space consistent with the background expansion history is excluded by the RSD data at more than $8ensuremath{sigma}$ because of the too large growth rate predicted by the theory. Finally, we consider the extended Galileon scenario, and we find that, in contrast to the covariant Galileon, there is a model parameter space for a tracker solution that is consistent with the RSD data within a $2ensuremath{sigma}$ level." @default.
• W2150269787 created "2016-06-24" @default.
• W2150269787 creator A5013481498 @default.
• W2150269787 creator A5055706716 @default.
• W2150269787 creator A5068607244 @default.
• W2150269787 date "2013-05-07" @default.
• W2150269787 modified "2023-10-02" @default.
• W2150269787 title "Constraints on<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>f</mml:mi><mml:mo stretchy=false>(</mml:mo><mml:mi>R</mml:mi><mml:mo stretchy=false>)</mml:mo></mml:math>theory and Galileons from the latest data of galaxy redshift surveys" @default.
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