ENVIRONMENT DEPENDENCE OF DARK MATTER HALOS IN SYMMETRON MODIFIED GRAVITY

2011/10/28 by Hans A. Winther, David F. Mota, Baojiu Li · 3 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark matter #Dark matter halo #Galactic halo #Gravitational lens #Halo #Scalar field dark matter #Yield (engineering) #astro-ph.CO #gr-qc #hep-ph #hep-th

paper · pdf · doi:10.1088/0004-637x/756/2/166

published as ApJ 756 166, 2012 · 10 pages, 5 figures

arxiv created 2011/10/28 · openalex publication_date 2012/08/24 · arxiv updated 2013/05/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

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 halo's 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 coupling to matter.

Citations

• SUB-MILLIMETER TESTS OF THE GRAVITATIONAL INVERSE SQUARE LAW
• Varying alpha in a more realistic universe
• Dynamical masses in modified gravity
• A test of general relativity using radio links with the Cassini spacecraft
• The galileon as a local modification of gravity
• Self-Consistent Cosmological Simulations of DGP Braneworld Gravity

Cited by

• Distinguishing screening mechanisms with environment-dependent velocity statistics
• Constraining ƒ(R) Gravity by the Large-Scale Structure
• Spatial variations of the fine-structure constant in symmetron models