A Multi-wavelength Mass Analysis of RCS2 J232727.6-020437, A ̃3 × 1015 M☉ Galaxy Cluster at z = 0.7

Journal
Date Issued
2015
Author(s)
Sharon, K.
•
Gladders, M. D.
•
Marrone, D. P.
•
Hoekstra, H.
•
•
Bourdin, H.
•
Gifford, D.
•
Hicks, A. K.
•
Greer, C.
•
Mroczkowski, T.
•
Barrientos, L. F.
•
Bayliss, M.
•
Carlstrom, J. E.
•
Gilbank, D. G.
•
Gralla, M.
•
Hlavacek-Larrondo, J.
•
Leitch, E.
•
Mazzotta, P.
•
Miller, C.
•
Muchovej, S. J. C.
•
Schrabback, T.
•
Yee, H. K. C.
•
RCS-Team
DOI
Description
We wish to thank the anonymous referee for a constructive review that improved the quality of this manuscript. Support for program number GO-10846 was provided by NASA through a grant from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. Support for this work was provided by the National Aeronautics and Space Administration through Chandra award GO2-13158X issued by the Chandra X-ray Observatory Center, which is operated by the Smithsonian Astrophysical Observatory for and on behalf of the National Aeronautics Space Administration under contract NAS8-03060. Based on observations obtained at the Gemini Observatory, which is operated by the Association of Universities for Research in Astronomy, Inc., under a cooperative agreement with the NSF on behalf of the Gemini partnership: the National Science Foundation (United States), the National Research Council (Canada), CONICYT (Chile), the Australian Research Council (Australia), Ministério da Ciência, Tecnologia e Inovação (Brazil) and Ministerio de Ciencia, Tecnología e Innovación Productiva (Argentina). Based on observations obtained with MegaPrime/MegaCam, a joint project of CFHT and CEA/DAPNIA, at the Canada–France–Hawaii Telescope (CFHT) which is operated by the National Research Council (NRC) of Canada, the Institute National des Sciences de l’Univers of the Centre National de la Recherche Scientifique of France, and the University of Hawaii. We also present observation taken at the Magellan telescopes at Las Campanas Observatory, Chile, using LDSS-3 and GISMO. CARMA/SZA operations and science support is provided by the National Science Foundation under a cooperative agreement and by the CARMA partner universities; the CARMA/SZA work presented here was supported by NSF grant AST- 1140019 to the University of Chicago. E.R. acknowledges support from the National Science Foundation AST-1210973, SAO TM3-14008X (issued under NASA Contract No. NAS8-03060). L.F.B.'s research is funded by proyecto FONDECYT 1120676 and Centro BASAL CATA. E.R. acknowledges support from FP7-PEOPLE-2013-IIF under Grant Agreement PIIF-GA-2013-627474. Facilities: Magellan , HST (ACS) , CXO (ASIS) , CFHT , Gemini .
Abstract
We present an initial study of the mass and evolutionary state of a massive and distant cluster, RCS2 J232727.6-020437. This cluster, at z = 0.6986, is the richest cluster discovered in the RCS2 project. The mass measurements presented in this paper are derived from all possible mass proxies: X-ray measurements, weak-lensing shear, strong lensing, Sunyaev-Zel’dovich effect decrement, the velocity distribution of cluster member galaxies, and galaxy richness. While each of these observables probe the mass of the cluster at a different radius, they all indicate that RCS2 J232727.6-020437 is among the most massive clusters at this redshift, with an estimated mass of {M}200̃ 3× {10}15{h}70-1 {M}☉ . In this paper, we demonstrate that the various observables are all reasonably consistent with each other to within their uncertainties. RCS2 J232727.6-020437 appears to be well relaxed—with circular and concentric X-ray isophotes, with a cool core, and no indication of significant substructure in extensive galaxy velocity data.

Based on observations obtained with : MegaPrime/MegaCam, a joint project of CFHT and CEA/DAPNIA, at the Canada-France-Hawaii Telescope (CFHT) which is operated by the National Research Council (NRC) of Canada, the Institut National des Science de l’Univers of the Centre National de la Recherche Scientifique (CNRS) of France, and the University of Hawaii; the NASA/ESA Hubble Space Telescope (HST), obtained from the data archive at the Space Telescope Institute. STScI is operated by the association of Universities for Research in Astronomy, Inc. under the NASA contract NAS 5-2655; the 6.5 m Magellan telescopes located at Las Campanas Observatory, Chile;

Volume
814
Issue
1
Start page
21
Uri
Url
Issn Identifier
0004-637X
Ads BibCode
2015ApJ...814...21S
Rights
open.access
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