A MULTI-WAVELENGTH MASS ANALYSIS OF RCS2 J232727.6-020437, A ∼ 3 x 1015 M⊙ GALAXY CLUSTER AT z=0.7

被引：14

作者：

Sharon, K. ^{[1
]}

Gladders, M. D. ^{[2
,3
]}

Marrone, D. P. ^{[4
]}

Hoekstra, H. ^{[5
]}

Rasia, E. ^{[6
,7
]}

Bourdin, H. ^{[8
]}

Gifford, D. ^{[1
]}

Hicks, A. K. ^{[9
]}

Greer, C. ^{[4
]}

Mroczkowski, T. ^{[10
]}

Barrientos, L. F. ^{[11
]}

Bayliss, M. ^{[12
,13
]}

Carlstrom, J. E. ^{[2
,3
]}

Gilbank, D. G. ^{[14
]}

Gralla, M. ^{[13
,15
]}

Hlavacek-Larrondo, J. ^{[16
]}

Leitch, E. ^{[2
,3
]}

Mazzotta, P. ^{[8
]}

Miller, C. ^{[1
]}

Muchovej, S. J. C. ^{[17
]}

Schrabback, T. ^{[18
]}

Yee, H. K. C. ^{[19
]}

机构：

[1] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA

[2] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA

[3] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA

[4] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA

[5] Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands

[6] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA

[7] INAF Osservatorio Astronom Trieste, I-34121 Trieste, Italy

[8] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy

[9] Sustainable Engn Grp, Middleton, WI 53562 USA

[10] US Naval Res Lab, Washington, DC 20375 USA

[11] Pontificia Univ Catolica Chile, Santiago 22, Chile

[12] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[13] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[14] S African Astron Observ, ZA-7935 Observatory, South Africa

[15] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

[16] Univ Montreal, Dept Phys, Montreal, PQ H3C 3J7, Canada

[17] CALTECH, Owens Valley Radio Observ, Big Pine, CA 93513 USA

[18] Univ Bonn, Argelander Inst Astron, D-53121 Bonn, Germany

[19] Univ Toronto, Dept Astron & Astrophys, Toronto, ON M5S 3H4, Canada

来源：

ASTROPHYSICAL JOURNAL | 2015年 / 814卷 / 01期

基金：

美国国家科学基金会; 美国国家航空航天局;

关键词：

galaxies:; clusters:; individual; (RCS2; J232727.6-020437); RAY-SELECTED CLUSTERS; WEAK-LENSING MASSES; SUNYAEV-ZELDOVICH; RED-SEQUENCE; DARK-MATTER; SPECTROSCOPIC CONFIRMATION; SCALING RELATIONS; PRESSURE PROFILE; DISTANT CLUSTERS; MERGING CLUSTER;

D O I：

10.1088/0004-637X/814/1/21

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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-200 similar to 3 x 10(15)h(70)(-1) M-circle dot. 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.

引用

页数：18

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