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Halos and Voids in f(R) Gravity

Li, B.; Zhao, G.; Koyama, K.

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Authors

G. Zhao

K. Koyama



Abstract

In this paper, we study the distribution of dark matter haloes and voids using high‐resolution simulations in f(R) gravity models with the chameleon mechanism to screen the fifth force in a dense environment. For dark matter haloes, we show that the semi‐analytic thin‐shell condition provides a good approximation to describe the mass and environmental dependence of the screening of the fifth force in haloes. Due to stronger gravity, there are far more massive haloes and large voids in f(R) models compared with Λ cold dark matter (ΛCDM) models. The numbers of voids with an effective radius of 15 h−1 Mpc are twice and four times as many as those in ΛCDM for f(R) models with |fR0|= 10−5 and 10−4, respectively. This provides a new means to test the models using the upcoming observational data. We also find that haloes inside voids are significantly less screened in our simulations, and so are ideal objects for the gravity test.

Journal Article Type Article
Publication Date Apr 21, 2012
Deposit Date Jan 20, 2012
Publicly Available Date May 2, 2014
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Royal Astronomical Society
Peer Reviewed Peer Reviewed
Volume 421
Issue 4
Pages 3481-3487
DOI https://doi.org/10.1111/j.1365-2966.2012.20573.x
Keywords Methods: analytical, Methods: numerical, Cosmology: theory, Dark energy, Large-scale structure of Universe.
Public URL https://durham-repository.worktribe.com/output/1498758

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Copyright Statement
This article has been accepted for publication in Monthly notices of the Royal Astronomical Society © 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS Published by Oxford University Press on behalf of Royal Astronomical Society. All rights reserved.






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