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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 660623.0, MPI für Astronomie / Publikationen_mpia
CLASH: mass distribution in and around MACS J1206.2-0847 from a full cluster lensing analysis
Authors:Umetsu, K.; Medezinski, E.; Nonino, M.; Merten, J.; Zitrin, A.; Molino, A.; Grillo, C.; Carrasco, M.; Donahue, M.; Mahdavi, A.; Coe, D.; Postman, M.; Koekemoer, A.; Czakon, N.; Sayers, J.; Mroczkowski, T.; Golwala, S.; Koch, P. M.; Lin, K.-Y.; Molnar, S. M.; Rosati, P.; Balestra, I.; Mercurio, A.; Scodeggio, M.; Biviano, A.; Anguita, T.; Infante, L.; Seidel, G.; Sendra, I.; Jouvel, S.; Host, O.; Lemze, D.; Broadhurst, T.; Meneghetti, M.; Moustakas, L.; Bartelmann, M.; Benítez, N.; Bouwens, R.; Bradley, L.; Ford, H.; Jiménez-Teja, Y.; Kelson, D.; Lahav, O.; Melchior, P.; Moustakas, J.; Ogaz, S.; Seitz, S.; Zheng, W.
Date of Publication (YYYY-MM-DD):2012
Journal Abbrev.:The Astrophysical Journal
Volume:755
Issue / Number:1
Start Page:id. 56
Audience:Not Specified
Abstract / 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 BVR c I c z' imaging and our recent 16-band Hubble Space Telescope observations taken as part of the Cluster Lensing And Supernova survey with Hubble 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 northwest-southeast (NW-SE), aligned with the cluster and its brightest galaxy shapes, showing elongation with a ~2: 1 axis ratio in the plane of the sky. Our full-lensing mass profile exhibits a shallow profile slope dln Σ/dln R ~ -1 at cluster outskirts (R >~ 1 Mpc h -1), whereas the mass distribution excluding the NW-SE excess regions steepens farther out, well described by the Navarro-Frenk-White form. Assuming a spherical halo, we obtain a virial mass M vir = (1.1 ± 0.2 ± 0.1) × 1015 M &sun; h -1 and a halo concentration c vir = 6.9 ± 1.0 ± 1.2 (c vir ~ 5.7 when the central 50 kpc h -1 is excluded), which falls in the range 4 <~ langcrang <~ 7 of average c(M, z) predictions for relaxed clusters from recent Λ 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, they yield a cumulative gas mass fraction of 13.7+4.5 - 3.0% at 0.7 Mpc h -1(≈ 1.7 r 2500), a typical value observed for high-mass clusters. Based in part on data collected at the Subaru Telescope, which is operated by the National Astronomical Society of Japan.
Free Keywords:cosmology: observations; dark matter; galaxies: clusters: individual: MACS J1206.2-0847; gravitational lensing: strong; gravitational lensing: weak
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://cdsads.u-strasbg.fr/abs/2012ApJ...755...56U
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