Testing gravity using the environmental dependence of dark matter halos

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

Abstract

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.

Citation

Zhao, G., Li, B., & Koyama, K. (2011). Testing gravity using the environmental dependence of dark matter halos. Physical Review Letters, 107(7), Article 071303. https://doi.org/10.1103/physrevlett.107.071303

• 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
• DOI: https://doi.org/10.1103/physrevlett.107.071303