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Testing gravity using the environmental dependence of dark matter halos

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


G. Zhao

K. Koyama


In this Letter, we investigate the environmental dependence of dark matter halos in theories which attempt to explain the accelerated expansion of the Universe by modifying general relativity (GR). Using high-resolution N-body simulations in f(R) gravity models which recover GR in dense environments by virtue of the chameleon mechanism, we find a significant difference, which depends on the environment, between the lensing and dynamical masses of dark matter halos. This environmental dependence of the halo properties can be used as a smoking gun to test GR observationally.

Journal Article Type Article
Publication Date Aug 10, 2011
Deposit Date Jan 20, 2012
Publicly Available Date Jul 16, 2014
Journal Physical Review Letters
Print ISSN 0031-9007
Electronic ISSN 1079-7114
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 107
Issue 7
Article Number 071303
Public URL


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