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Testing modified gravity using a marked correlation function

Armijo, J.; Y.-c., Cai; Padilla, N.; Li, B.; Peacock, J.A.

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Authors

J. Armijo

Cai Y.-c.

N. Padilla

J.A. Peacock



Abstract

In theories of modified gravity with the chameleon screening mechanism, the strength of the fifth force depends on environment. This induces an environment dependence of structure formation, which differs from Λ-cold-dark-matter (ΛCDM). We show that these differences could be captured by the marked correlation function. With the galaxy correlation functions and number densities calibrated to match between f(R) and ΛCDM models in simulations, we show that the marked correlation functions by using either the local galaxy number density or halo mass as the marks encode extra information, which can be used to test these theories. We discuss possible applications of these statistics in observations.

Journal Article Type Article
Acceptance Date May 14, 2018
Online Publication Date May 21, 2018
Publication Date May 21, 2018
Deposit Date Jul 11, 2018
Publicly Available Date Jul 12, 2018
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 478
Issue 3
Pages 3627-3632
DOI https://doi.org/10.1093/mnras/sty1335
Public URL https://durham-repository.worktribe.com/output/1326083

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Copyright Statement
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2018 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.






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