2004/12/31 by Adi Nusser, Steven S. Gubser, S. S. Gubser +1
Physics and Astronomy · #Astrophysics #Black Holes and Theoretical Physics #Cold dark matter #Cosmology #Cosmology and Gravitation Theories #Dark energy #Dark fluid #Dark matter #Dark matter halo #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy formation and evolution #Halo #Physics #Redshift #Scalar (mathematics) #Scalar field dark matter #Structure formation #astro-ph #hep-th
paper · pdf · doi:10.1103/physrevd.71.083505
published as Phys.Rev. D71 (2005) 083505 · 10 pages, 7 figures, revtex4. v2: minor improvements, refs added, version to appear in PRD
arxiv created 2005/02/28 · openalex publication_date 2005/04/11 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Numerical simulations show that a long-range scalar interaction in a single species of massive dark matter particles causes voids between the concentrations of large galaxies to be more nearly empty, suppresses accretion of intergalactic matter onto galaxies at low redshift, and produces an early generation of dense dark matter halos. These three effects, in moderation, seem to be improvements over the \ensuremathΛCDM model predictions for cosmic structure formation. Because the scalar interaction in this model has negligible effect on laboratory physics and the classical cosmological tests, it offers an observationally attractive example of cosmology with complicated physics in the dark sector, notably a large violation of the weak equivalence principle.