Revisiting the matter power spectra in f(R) gravity

He, J.H.; Li, B.; Jing, Y.

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−110−3, 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.

Citation

He, J., Li, B., & Jing, Y. (2013). Revisiting the matter power spectra in f(R) gravity. Physical Review D, 88(10), Article 103507. https://doi.org/10.1103/physrevd.88.103507

• Journal Article Type: Article
• Publication Date: Nov 8, 2013
• Deposit Date: Jun 3, 2013
• Publicly Available Date: May 8, 2014
• Journal: Physical Review D - Particles, Fields, Gravitation, and Cosmology
• Print ISSN: 1550-7998
• Electronic ISSN: 1550-2368
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 88
• Issue: 10
• Article Number: 103507
• DOI: https://doi.org/10.1103/physrevd.88.103507
• Public URL: https://durham-repository.worktribe.com/output/1451379
• Publisher URL: http://prd.aps.org/abstract/PRD/v88/i10/e103507