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The Distribution of Dark Matter Over 3 Decades in Radius in the Lensing Cluster Abell 611 by Newman, A. B.; Treu, T.; Ellis, R. S.; Sand, D. J.; Richard, J.; Marshall, P. J.; Capak, P.; Miyazaki, S. is a scholarly article available to read on EtoBox.

What is The Distribution of Dark Matter Over 3 Decades in Radius in the Lensing Cluster Abell 611 about?

We present a detailed analysis of the baryonic and dark matter distribution in the lensing cluster Abell 611 (z=0.288), with the goal of determining the dark matter profile over an unprecedented range of cluster-centric distance. By combining three complementary probes of the mass distribution, weak lensing from deep multi-color imaging, strong lensing constraints based on the identification of multiply-imaged sources, and resolved stellar velocity dispersion measures for the brightest cluster galaxy (BCG), we extend the methodology for separating the dark and baryonic mass components introduced by Sand et al. (2008). Our resulting dark matter profile samples the cluster from ~3 kpc to 3.25 Mpc, thereby providing an excellent basis for comparisons with recent numerical models. We demonstrate that only by combining our three observational techniques can degeneracies in constraining the form of the dark matter profile be broken on scales crucial for detailed comparisons with numerical simulations. Our analysis reveals that a simple Navarro, Frenk, and White (NFW) profile is an unacceptable fit to our data. We confirm earlier claims that the inner profile of the dark matter profile de

Author

Newman, A. B.; Treu, T.; Ellis, R. S.; Sand, D. J.; Richard, J.; Marshall, P. J.; Capak, P.; Miyazaki, S.

Published

2009

Language

EN