Environment Dependence of Dark Matter Halos in Symmetron Modified Gravity

Details Environment Dependence of Dark Matter Halos in Symmetron Modified Gravity Environment Dependence of Dark Matter Halos in Symmetron Modified Gravity

2011-10-28

arxiv.org/abs/1110.6438v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

10 pages, 5 figures

Scientific paper

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 halos 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 the coupling to matter.

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