Journal
ASTROPHYSICAL JOURNAL
Volume 755, Issue 1, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/0004-637X/755/1/56
Keywords
cosmology: observations; dark matter; galaxies: clusters: individual (MACS J1206.2-0847); gravitational lensing: strong; gravitational lensing: weak
Categories
Funding
- NASA [NAS 5-26555, NAS 5-32864, HST-GO-12065.01-A]
- National Science Council of Taiwan [NSC100-2112-M-001-008-MY3]
- PRIN INAF
- Academia Sinica Career Development Award
- ESO Paranal Observatory [186.A-0798]
- DFG cluster of excellence Origin and Structure of the Universe
- NASA Graduate Student Research Fellowship
- Internationale Spitzenforschung II/2 of the Baden-Wurttemberg Stiftung
- Dark Cosmology Centre
- Danish National Research Foundation
- Spanish Ministry of Economy and Competitiveness [FIS2010-15492]
- NASA through the Einstein Fellowship Program [PF0-110077]
- [NSF/AST0838261]
- [NASA/NNX11AB07G]
- STFC [ST/J001511/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/J001511/1] Funding Source: researchfish
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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 similar to 2:1 axis ratio in the plane of the sky. Our full-lensing mass profile exhibits a shallow profile slope d ln Sigma/d ln R similar to -1 at cluster outskirts (R greater than or similar to 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) x 10(15) M-circle dot h(-1) and a halo concentration c(vir) = 6.9 +/- 1.0 +/- 1.2 (c(vir) similar to 5.7 when the central 50 kpc h(-1) is excluded), which falls in the range 4 less than or similar to < c > less than or similar to 7 of average c(M, z) predictions for relaxed clusters from recent. 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(-3.0)(+4.5)% at 0.7 Mpc h(-1) (approximate to 1.7 r(2500)), a typical value observed for high-mass clusters.
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