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Environment dependence of dark matter halos in symmetron modified gravity.

Winther, H. A. and Mota, D. F. and Li, B. (2012) 'Environment dependence of dark matter halos in symmetron modified gravity.', Astrophysical journal., 756 (2). p. 166.


We investigate the environment dependence of dark matter halos in the symmetron modified gravity scenario. The symmetron is one of three known mechanisms for screening a fifth force and thereby recovering general relativity in dense environments. The effectiveness of the screening depends on both the mass of the object and the environment it lies in. Using high-resolution N-body simulations we find a significant difference, which depends on the halo's mass and environment, between the lensing and dynamical masses of dark matter halos similar to the f(R) modified gravity. The symmetron can however yield stronger signatures due to a freedom in the strength of coupling to matter.

Item Type:Article
Keywords:Cosmology: miscellaneous, Cosmology: theory, Large-scale structure of Universe.
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Publisher statement:© 2012. The American Astronomical Society. All rights reserved. Printed in the U.S.A.
Date accepted:No date available
Date deposited:02 May 2014
Date of first online publication:September 2012
Date first made open access:No date available

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