Spectroscopic Confirmation of Five Galaxy Clusters at z > 1.25 in the 2500 deg2 SPT-SZ Survey

被引：14

作者：

Khullar, G. ^{[1
,2
]}

Bleem, L. E. ^{[2
,3
]}

Bayliss, M. B. ^{[4
]}

Gladders, M. D. ^{[1
,2
]}

Benson, B. A. ^{[1
,2
,5
]}

McDonald, M. ^{[4
]}

Allen, S. W. ^{[6
,7
,8
]}

Applegate, D. E. ^{[2
]}

Ashby, M. L. N. ^{[9
]}

Bocquet, S. ^{[3
]}

Brodwin, M. ^{[10
]}

Bulbul, E. ^{[9
]}

Canning, R. E. A. ^{[7
,8
]}

Capasso, R. ^{[11
,12
]}

Chiu, I. ^{[13
]}

Crawford, T. M. ^{[1
,2
]}

de Haan, T. ^{[14
]}

Dietrich, J. P. ^{[11
,12
]}

Gonzalez, A. H. ^{[15
]}

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

Hoekstra, H. ^{[17
]}

Holzapfel, W. L. ^{[14
]}

von der Linden, A. ^{[18
]}

Mantz, A. B. ^{[7
,8
]}

Patil, S. ^{[19
]}

Reichardt, C. L. ^{[19
]}

Saro, A. ^{[20
]}

Sharon, K. ^{[21
]}

Stalder, B. ^{[22
]}

Stanford, S. A. ^{[23
]}

Stark, A. A. ^{[9
]}

Strazzullo, V. ^{[11
]}

机构：

[1] Univ Chicago, Dept Astron & Astrophys, 5640 South Ellis Ave, Chicago, IL 60637 USA

[2] Univ Chicago, Kavli Inst Cosmol Phys, 5640 South Ellis Ave, Chicago, IL 60637 USA

[3] Argonne Natl Lab, Div High Energy Phys, 9700 S Cass Ave, Argonne, IL 60439 USA

[4] MIT, Kavli Inst Astrophys & Space Res, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[5] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA

[6] SLAC Natl Accelerator Lab, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA

[7] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, 452 Lomita Mall, Stanford, CA 94305 USA

[8] Stanford Univ, Dept Phys, 382 Via Pueblo Mall, Stanford, CA 94305 USA

[9] Harvard Smithsonian Ctr Astrophys, 60 Garden St,MS 66, Cambridge, MA 02138 USA

[10] Univ Missouri, Dept Phys & Astron, 5110 Rockhill Rd, Kansas City, MO 64110 USA

[11] Ludwig Maximilians Univ Munchen, Fac Phys, Scheinerstr 1, D-81679 Munich, Germany

[12] Excellence Cluster Universe, Boltzmannstr 2, D-85748 Garching, Germany

[13] Acad Sinica, Inst Astron & Astrophys, 11F AS NTU Astron Math Bldg,1,Sec 4,Roosevelt Rd, Taipei 10617, Taiwan

[14] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[15] Univ Florida, Dept Astron, Gainesville, FL 32611 USA

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

[17] Leiden Univ, Leiden Observ, Niels Bohrweg 2, NL-2333 CA Leiden, Netherlands

[18] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA

[19] Univ Melbourne, Sch Phys, Parkville, Vic 3010, Australia

[20] INAF Observ Astron Trieste, Via GB Tiepolo 11, I-34143 Trieste, Italy

[21] Univ Michigan, Dept Astron, 1085 South Univ Dr, Ann Arbor, MI 48109 USA

[22] LSST, 950 North Cherry Ave, Tucson, AZ 85719 USA

[23] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA

来源：

ASTROPHYSICAL JOURNAL | 2019年 / 870卷 / 01期

基金：

澳大利亚研究理事会; 美国国家科学基金会;

关键词：

galaxies: clusters: general; galaxies: distances and redshifts; galaxies: evolution; galaxies: kinematics and dynamics; galaxies: high-redshift; ATACAMA COSMOLOGY TELESCOPE; COLOR-MAGNITUDE RELATION; STAR-FORMATION; MASSIVE CLUSTER; XMM-NEWTON; TO; EVOLUTION; REDSHIFTS; SUPERCLUSTER; POPULATION;

D O I：

10.3847/1538-4357/aaeed0

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present spectroscopic confirmation of five galaxy clusters at 1.25 < z < 1.5, discovered in the 2500 deg(2) South Pole Telescope Sunyaev-Zel'dovich (SZ) survey. These clusters, taken from a mass-limited sample with a nearly redshift-independent selection function, have multiwavelength follow-up imaging data from the X-ray to near-IR and currently form the most homogeneous massive high-redshift cluster sample known. We identify 44 member galaxies, along with 25 field galaxies, among the five clusters, and describe the full set of observations and data products from Magellan/LDSS3 multiobject spectroscopy of these cluster fields. We briefly describe the analysis pipeline and present ensemble analyses of cluster member galaxies that demonstrate the reliability of the measured redshifts. We report z = 1.259, 1.288, 1.316, 1.401, and 1.474 for the five clusters from a combination of absorption-line (Ca II H&K doublet-lambda lambda 3968, 3934) and emission-line ([O II] lambda lambda 3727, 3729) spectral features. Moreover, the calculated velocity dispersions yield dynamical cluster masses in good agreement with the SZ masses for these clusters. We discuss the velocity and spatial distributions of passive and [O II]-emitting galaxies in these clusters, showing that they are consistent with velocity segregation and biases observed in lower redshift South Pole Telescope clusters. We identify modest [O II] emission and pronounced CN and Hd absorption in a stacked spectrum of 28 passive galaxies with Ca II H&K-derived redshifts. This work increases the number of spectroscopically confirmed SZ-selected galaxy clusters at z > 1.25 from three to eight, further demonstrating the efficacy of SZ selection for the highest redshift massive clusters and enabling detailed study of these systems.

引用

页数：16

共 91 条

[91] IDCS J1433.2+3306: AN INFRARED-SELECTED GALAXY CLUSTER AT z=1.89 [J].

Zeimann, Gregory R. ;

Stanford, S. A. ;

Brodwin, Mark ;

Gonzalez, Anthony H. ;

Snyder, Gregory F. ;

Stern, Daniel ;

Eisenhardt, Peter ;

Mancone, Conor ;

Dey, Arjun .

ASTROPHYSICAL JOURNAL, 2012, 756 (02)

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