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Testing gravity using the environmental dependence of dark matter halos.

Zhao, G. and Li, B. and Koyama, K. (2011) 'Testing gravity using the environmental dependence of dark matter halos.', Physical review letters., 107 (7). 071303.


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.

Item Type:Article
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Publisher statement:© 2011 American Physical Society
Date accepted:No date available
Date deposited:No date available
Date of first online publication:August 2011
Date first made open access:No date available

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