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Revisiting the matter power spectra in f(R) gravity.

He, J. H. and Li, B. and Jing, Y. (2013) 'Revisiting the matter power spectra in f(R) gravity.', Physical review D., 88 (10). p. 103507.

Abstract

In this paper, we study the nonlinear matter power spectrum in a specific family of f(R) models that can reproduce the ΛCDM background expansion history, using high resolution N-body simulations based on the ecosmog code. We measure the matter power spectrum in the range of 0.05h  Mpc−1<k<10h  Mpc−1 from simulations for our f(R) models and give theoretical explanations to their behavior and evolution patterns. We also examine the chameleon mechanism for our models and find that it works throughout the cosmic history in dense regions, for our f(R) models with |fR0|<10−4. On the other hand, for models with |fR0|>10−3, we find no chameleon screening in dense regions at late times (z<3), which means that those models could be ruled out due to the factor-of-1/3 enhancement to the strength of Newtonian gravity. We also give the best-fit parameters for a generalized parametrized post-Friedman fitting formula, which works well for the models studied here.

Item Type:Article
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Status:Peer-reviewed
Publisher Web site:http://dx.doi.org/10.1103/PhysRevD.88.103507
Publisher statement:Reprinted with permission from the American Physical Society: He, J. H. and Li, B. and Jing, Y., Physical review D, 88 (10). p. 103507, 2013. © 2013 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.
Date accepted:No date available
Date deposited:08 May 2014
Date of first online publication:November 2013
Date first made open access:No date available

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