CLASH: Mass Distribution in and around MACS J1206.2-0847 from a Full Cluster Lensing Analysis
Creators: name: Umetsu, Keiichi
name: Medezinski, Elinor
name: Nonino, Mario
name: Merten, Julian
name: Zitrin, Adi
name: Molino, Alberto
name: Grillo, Claudio
name: Carrasco, Mauricio
name: Donahue, Megan
name: Mahdavi, Andisheh
name: Coe, Dan
name: Postman, Marc
name: Koekemoer, Anton
name: Czakon, Nicole
name: Sayers, Jack
name: Mroczkowski, Tony
name: Golwala, Sunil
name: Koch, Patrick M.
name: Lin, Kai-Yang
name: Molnar, Sandor M.
name: Rosati, Piero
name: Balestra, Italo
name: Mercurio, Amata
name: Scodeggio, Marco
name: Biviano, Andrea
name: Anguita, Timo
name: Infante, Leopoldo
name: Seidel, Gregor
name: Sendra, Irene
name: Jouvel, Stephanie
name: Host, Ole
name: Lemze, Doron
name: Broadhurst, Tom
name: Meneghetti, Massimo
name: Moustakas, Leonidas
name: Bartelmann, Matthias
name: Benitez, Narciso
name: Bouwens, Rychard
name: Bradley, Larry
name: Ford, Holland
name: Jimenez-Teja, Yolanda
name: Kelson, Daniel
name: Lahav, Ofer
name: Melchior, Peter
name: Moustakas, John
name: Ogaz, Sara
name: Seitz, Stella
name: Zheng, Wei
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We derive an accurate mass distribution of the galaxy cluster MACS J1206.2-0847 (z=0.439) from a combined weak-lensing distortion, magnification, and strong-lensing analysis of wide-field Subaru BVRIz' imaging and our recent 16-band Hubble Space Telescope observations taken as part of the Cluster Lensing And Supernova survey with Hubble (CLASH) program. We find good agreement in the regions of overlap between several weak and strong lensing mass reconstructions using a wide variety of modeling methods, ensuring consistency. The Subaru data reveal the presence of a surrounding large scale structure with the major axis running approximately north-west south-east (NW-SE), aligned with the cluster and its brightest galaxy shapes, showing elongation with a \sim 2:1 axis ratio in the plane of the sky. Our full-lensing mass profile exhibits a shallow profile slope dlnΣ/dlnR\sim -1 at cluster outskirts (R&gt;1Mpc/h), whereas the mass distribution excluding the NW-SE excess regions steepens further out, well described by the Navarro-Frenk-White form. Assuming a spherical halo, we obtain a virial mass M_{vir}=(1.1\pm 0.2\pm 0.1)\times 10^{15} M_{sun}/h and a halo concentration c_{vir} = 6.9\pm 1.0\pm 1.2 (\sim 5.7 when the central 50kpc/h is excluded), which falls in the range 4&lt; &lt;7 of average c(M,z) predictions for relaxed clusters from recent Lambda cold dark matter simulations. Our full lensing results are found to be in agreement with X-ray mass measurements where the data overlap, and when combined with Chandra gas mass measurements, yield a cumulative gas mass fraction of 13.7^{+4.5}_{-3.0}% at 0.7Mpc/h (\approx 1.7r_{2500}), a typical value observed for high mass clusters.
description: Accepted by ApJ (30 pages, 17 figures), one new figure (Figure 10) added, minor text changes; a version with high resolution figures available at http://www.asiaa.sinica.edu.tw/~keiichi/upfiles/MACS1206/ms_highreso.pdf