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Published October 20, 2015 | Published
Journal Article Open

The Massive and Distant Clusters of WISE Survey: MOO J1142+1527, a 10^(15) M_⊙ Galaxy Cluster at z = 1.19


We present confirmation of the cluster MOO J1142+1527, a massive galaxy cluster discovered as part of the Massive and Distant Clusters of WISE Survey. The cluster is confirmed to lie at z = 1.19, and using the Combined Array for Research in Millimeter-wave Astronomy we robustly detect the Sunyaev–Zel'dovich (SZ) decrement at 13.2σ. The SZ data imply a mass of M_(200m) = (1.1 ± 0.2) × 10^(15)M_⊙, making MOO J1142+1527 the most massive galaxy cluster known at z > 1.15 and the second most massive cluster known at z > 1. For a standard ΛCDM cosmology it is further expected to be one of the ~5 most massive clusters expected to exist at z ≥ 1.19 over the entire sky. Our ongoing Spitzer program targeting ~1750 additional candidate clusters will identify comparably rich galaxy clusters over the full extragalactic sky.

Additional Information

© 2015 The American Astronomical Society. Received 2015 September 4; accepted 2015 October 7; published 2015 October 21. We thank the anonymous referee for comments that improved the quality of this paper. Support for this research was provided by NASA through Spitzer GO program 90177, ADAP grant NNX12AE15G, and NASA Exoplanet Science Institute grants 1461527 and 1486927. The work by SAS at LLNL was performed under the auspices of the U. S. Department of Energy under Contract No. W-7405-ENG-48. Support for CARMA construction was derived from the Gordon and Betty Moore Foundation; the Kenneth T. and Eileen L. Norris Foundation; the James S. McDonnell Foundation; the Associates of the California Institute of Technology; the University of Chicago; the states of California, Illinois, and Maryland; and the National Science Foundation. CARMA development and operations were supported by NSF under a cooperative agreement and by the CARMA partner universities; the work at Chicago was supported by NSF grant AST-1140019. Additional support was provided by PHY-0114422. This publication makes use of data products from the Wide-field Infrared Survey Explorer, a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by NASA. This work is based in part on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. This work is based in part on data obtained at the W. M. Keck and Gemini Observatories. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Mauna Kea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. Facilities: WISE - Wide-field Infrared Survey Explorer, Spitzer (IRAC) - Spitzer Space Telescope satellite, CARMA - Combined Array for Research in Millimeter-Wave Astronomy, Keck:I (MOSFIRE) - , Keck:II (DEIMOS) - , Gemini:Gillett (GMOS) - .

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