Collisional dark matter and the structure of dark halos

Abstract

We study how the internal structure of dark halos is affected if Cold Dark Matter particles are assumed to have a large cross-section for elastic collisions. We identify a cluster halo in a large cosmological N-body simulation and resimulate its formation with progressively increasing resolution. We compare the structure found in the two cases where dark matter is treated as collisionless or as a fluid. For the collisionless case our results agree with those of other workers. Collisional dark matter results in a cluster which is more nearly spherical and has a more singular central density profile. Substructure within the cluster is only weakly suppressed relative to the collisionless case. The observed structure of dwarf galaxies argues against self-interacting dark matter if, as seems likely, intermediate cross-sections produce structure lying between the extremes we have simulated.

arXiv commentRevised, Figure3 replaced. ApJLetters in press

References in corpus (14)

• A Universal Density Profile from Hierarchical Clustering
• The Structure of Cold Dark Matter Halos
• Dark Matter Substructure in Galactic Halos
• Cold collapse and the core catastrophe
• Simulations of X-ray Clusters
• Clustering of Galaxies in a Hierarchical Universe: I. Methods and Results at z=0
• Observational and Theoretical Constraints on Singular Dark Matter Halos
• Galaxies in N-body simulations: overcoming the overmerging problem
• The Santa Barbara cluster comparison project: a comparison of cosmological hydrodynamics solutions
• The Evolution of X-ray Clusters in Low Density Universes
• The Cores of Dark Matter Dominated Galaxies: theory vs. observations
• The cosmological origin of the Tully-Fisher relation
• Two--body heating in numerical galaxy formation experiments
• Where are the First Stars now?

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