Environment dependence of dark matter halos in symmetron modified gravity

Winther, H.A.; Mota, D.F.; Li, B.

doi:10.1088/0004-637x/756/2/166

Environment dependence of dark matter halos in symmetron modified gravity

Winther, H.A.; Mota, D.F.; Li, B.

Authors

H.A. Winther

D.F. Mota

Professor Baojiu Li baojiu.li@durham.ac.uk
Professor

Abstract

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.

Citation

Winther, H., Mota, D., & Li, B. (2012). Environment dependence of dark matter halos in symmetron modified gravity. Astrophysical Journal, 756(2), Article 166. https://doi.org/10.1088/0004-637x/756/2/166

Journal Article Type	Article
Publication Date	Sep 10, 2012
Deposit Date	Jan 20, 2012
Publicly Available Date	May 2, 2014
Journal	Astrophysical Journal
Print ISSN	0004-637X
Electronic ISSN	1538-4357
Publisher	American Astronomical Society
Peer Reviewed	Peer Reviewed
Volume	756
Issue	2
Article Number	166
DOI	https://doi.org/10.1088/0004-637x/756/2/166
Keywords	Cosmology: miscellaneous, Cosmology: theory, Large-scale structure of Universe.