SPT-CL J2040-4451: AN SZ-SELECTED GALAXY CLUSTER AT z=1.478 WITH SIGNIFICANT ONGOING STAR FORMATION

被引：40

作者：

Bayliss, M. B. ^{[1
,2
]}

Ashby, M. L. N. ^{[2
]}

Ruel, J. ^{[1
]}

Brodwin, M. ^{[3
]}

Aird, K. A. ^{[4
]}

Bautz, M. W. ^{[5
]}

Benson, B. A. ^{[6
,7
]}

Bleem, L. E. ^{[6
,8
,9
]}

Bocquet, S. ^{[10
,11
]}

Carlstrom, J. E. ^{[6
,7
,8
,9
,12
]}

Chang, C. L. ^{[6
,7
,9
]}

Cho, H. M. ^{[13
]}

Clocchiattii, A. ^{[14
]}

Crawford, T. M. ^{[6
,12
]}

Crites, A. T. ^{[6
,12
]}

Desai, S. ^{[10
,11
]}

Dobbs, M. A. ^{[15
]}

Dudley, J. P. ^{[15
]}

Foley, R. J. ^{[2
,16
,17
]}

Forman, W. R.

George, E. M. ^{[18
]}

Gettings, D. ^{[19
]}

Gladders, M. D. ^{[6
,12
]}

Gonzalez, A. H. ^{[19
]}

de Haan, T. ^{[15
]}

Halverson, N. W. ^{[20
,21
]}

High, F. W. ^{[6
,12
]}

Holder, G. P. ^{[15
]}

Holzapfel, W. L. ^{[18
]}

Hoover, S. ^{[7
]}

Hrubes, J. D. ^{[4
]}

Jones, C. ^{[2
]}

Joy, M. ^{[22
]}

Keisler, R. ^{[6
,8
]}

Knox, L. ^{[23
]}

Lee, A. T. ^{[18
,24
]}

Leitch, E. M. ^{[6
,12
]}

Liu, J. ^{[10
]}

Lueker, M. ^{[18
,25
]}

Luong-Van, D. ^{[4
]}

Mantz, A. ^{[6
]}

Marrone, D. P. ^{[26
]}

Mawatari, K. ^{[2
]}

McDonald, M.

McMahon, J. J. ^{[27
]}

Mehl, J. ^{[6
,9
,12
]}

Meyer, S. S. ^{[6
,7
,8
]}

Miller, E. D. ^{[5
]}

Mocanu, L. ^{[6
,12
]}

Mohr, J. J. ^{[10
,11
,28
]}

机构：

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

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

[3] Univ Missouri, Dept Phys & Astron, Kansas City, MO 64110 USA

[4] Univ Chicago, Chicago, IL 60637 USA

[5] MIT, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA

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

[7] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA

[8] Univ Chicago, Dept Phys, Chicago, IL 60637 USA

[9] Argonne Natl Lab, Argonne, IL 60439 USA

[10] Univ Munich, Dept Phys, D-81679 Munich, Germany

[11] Excellence Cluster Universe, D-85748 Garching, Germany

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

[13] NIST, Quantum Devices Grp, Boulder, CO 80305 USA

[14] Pontificia Univ Catolica, Dept Astron & Astrophys, Santiago, Chile

[15] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada

[16] Univ Illinois, Dept Astron, Urbana, IL 61801 USA

[17] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

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

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

[20] Univ Colorado, Dept Astrophys & Planetary Sci, Boulder, CO 80309 USA

[21] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

[22] NASA, George C Marshall Space Flight Ctr, Dept Space Sci, Huntsville, AL 35812 USA

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

[24] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Phys, Berkeley, CA 94720 USA

[25] CALTECH, Pasadena, CA 91125 USA

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

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

[28] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany

[29] Case Western Reserve Univ, Ctr Educ & Res Cosmol & Astrophys, Dept Phys, Cleveland, OH 44106 USA

[30] Univ Minnesota, Dept Phys, Minneapolis, MN 55455 USA

[31] Space Telescope Sci Inst, Baltimore, MD 21218 USA

[32] Sch Art Inst Chicago, Liberal Arts Dept, Chicago, IL 60603 USA

[33] Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94551 USA

[34] Univ Toronto, Dunlap Inst Astron & Astrophys, Toronto, ON M5S 3H4, Canada

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

[36] Univ Calif Berkeley, Dept Phys, Berkeley Ctr Cosmol Phys, Berkeley, CA 94720 USA

[37] Lawrence Berkeley Natl Labs, Berkeley, CA 94720 USA

来源：

ASTROPHYSICAL JOURNAL | 2014年 / 794卷 / 01期

基金：

美国国家科学基金会;

关键词：

galaxies: clusters: individual (SPT-CL J2040-4451); galaxies: distances and redshifts; galaxies: evolution; large-scale structure of universe; COLOR-MAGNITUDE RELATION; 720 SQUARE DEGREES; RED-SEQUENCE; VELOCITY DISPERSIONS; ELLIPTIC GALAXIES; DISTANT CLUSTERS; MASSIVE CLUSTER; RICH CLUSTER; SKY SURVEY; IRAC;

D O I：

10.1088/0004-637X/794/1/12

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

SPT-CL J2040-4451-spectroscopically confirmed at z = 1.478-is the highest-redshift galaxy cluster yet discovered via the Sunyaev-Zel'dovich effect. SPT-CL J2040-4451 was a candidate galaxy cluster identified in the first 720 deg(2) of the South Pole Telescope Sunyaev-Zel'dovich (SPT-SZ) survey, and has been confirmed in follow-up imaging and spectroscopy. From multi-object spectroscopy with Magellan-I/Baade+ IMACS we measure spectroscopic redshifts for 15 cluster member galaxies, all of which have strong [O Pi]lambda lambda 3727 emission. SPT-CL J2040-4451 has an SZ-measured mass of M-500,(SZ) = 3.2 +/- 0.8 x 10(14)M(circle dot) h(-1) 70, corresponding to M-200,M- (SZ) = 5.8 +/- 1.4 x 10(14)M(circle dot) h(70-)(1.) The velocity dispersion measured entirely from blue star-forming members is sv = 1500 +/- 520 km s(-1). The prevalence of star-forming cluster members (galaxies with > 1.5M(circle dot) yr(-1)) implies that this massive, high-redshift cluster is experiencing a phase of active star formation, and supports recent results showing a marked increase in star formation occurring in galaxy clusters at z greater than or similar to 1.4. We also compute the probability of finding a cluster as rare as this in the SPT-SZ survey to be > 99%, indicating that its discovery is not in tension with the concordance Lambda CDM cosmological model.

引用

页数：14

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