The Density Profile of Cluster-scale Dark Matter Halos

Abstract

We measure the average gravitational shear profile of 6 massive clusters (M_vir ~ 10^15 M_sun) at z=0.3 out to a radius ~2h^-1 Mpc. The measurements are fitted to a generalized NFW-like halo model ρ(r) with an arbitrary r -> 0 slope α. The data are well fitted by such a model with a central cusp with α~ 0.9 - 1.6 (68% confidence interval). For the standard-NFW case α= 1.0, we find a concentration parameter c_vir that is consistent with recent predictions from high-resolution CDM N-body simulations. Our data are also well fitted by an isothermal sphere model with a softened core. For this model, our 1σupper limit for the core radius corresponds to a limit σ_star \leq 0.1 cm^2 g^-1 on the elastic collision cross-section in a self-interacting dark matter model.

4 pages, 3 figures; version accepted for publication by ApJ Letters. Three figures omitted to allow space for new fig. 3 and expanded results and discussion sections, including NSIS model fit

References in corpus (12)

• Mass Density Profiles of LSB Galaxies
• The dark matter density profile of the lensing cluster MS2137-23: a test of the cold dark matter paradigm
• Chandra Observations of Abell 2029: The Dark Matter Profile Down to <0.01 R_vir in an Unusually Relaxed Cluster
• Chandra Observations of the Lensing Cluster EMSS 1358+6245: Implications for Self-Interacting Dark Matter
• Wide field weak lensing observations of A1689
• A wide-field spectroscopic survey of the cluster of galaxies Cl0024+1654. II. A high-speed collision?
• Lensing Constraints on the Cores of Massive Dark Matter Halos
• HST large field weak lensing analysis of MS 2053-04: study of the mass distribution and mass-to-light ratio of X-ray selected clusters at 0.22<z<0.83
• Observational Constraints on the Self Interacting Dark Matter Scenario and the Growth of Supermassive Black Holes
• Probing the Core Structure of Dark Halos with Tangential and Radial Arc Statistics
• Weak Gravitational Lensing by a Sample of X-Ray Luminous Clusters of Galaxies -- II. Comparison with Virial Masses
• CDM, Feedback and the Hubble Sequence

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