Testing General Relativity using the Environmental Dependence of Dark Matter Halos
Cosmology and Nongalactic Astrophysics
2011-08-17 v3 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
In this Letter, we investigate the environmental dependence of dark matter halos in theories that 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 strong environmentally-dependent difference between the lensing mass and dynamical mass estimates of dark matter halos. This environmental dependence of the halo properties can be used as a smoking gun to test GR observationally.
Keywords
Cite
@article{arxiv.1105.0922,
title = {Testing General Relativity using the Environmental Dependence of Dark Matter Halos},
author = {Gong-Bo Zhao and Baojiu Li and Kazuya Koyama},
journal= {arXiv preprint arXiv:1105.0922},
year = {2011}
}
Comments
5 pages, 4 figures, version accepted to PRL