2008ApJ...684..905E

Query : 2008ApJ...684..905E

2008ApJ...684..905E - Astrophys. J., 684, 905-932 (2008/September-2)

Clusters of galaxies in the first half of the universe from the IRAC Shallow Survey.

EISENHARDT P.R.M., BRODWIN M., GONZALEZ A.H., STANFORD S.A., STERN D., BARMBY P., BROWN M.J.I., DAWSON K., DEY A., DOI M., GALAMETZ A., JANNUZI B.T., KOCHANEK C.S., MEYERS J., MOROKUMA T. and MOUSTAKAS L.A.

Abstract (from CDS):

We have identified 335 galaxy cluster and group candidates, 106 of which are at z>1, using a 4.5 µm-selected sample of objects from a 7.25 deg2 region in the Spitzer Infrared Array Camera (IRAC) Shallow Survey. Clusters were identified as three-dimensional overdensities using a wavelet algorithm, based on photometric redshift probability distributions derived from IRAC and NOAO Deep Wide-Field Survey data. We estimate only ∼10% of the detections are spurious. To date 12 of the z>1 candidates have been confirmed spectroscopically, at redshifts from 1.06 to 1.41. Velocity dispersions of ∼750 km/s for two of these argue for total cluster masses well above 1014 M☉, as does the mass estimated from the rest-frame near-infrared stellar luminosity. Although not selected to contain a red sequence, some evidence for red sequences is present in the spectroscopically confirmed clusters, and brighter galaxies are systematically redder than the mean galaxy color in clusters at all redshifts. The mean I-[3.6] color for cluster galaxies up to z∼1 is well matched by a passively evolving model in which stars are formed in a 0.1 Gyr burst starting at redshift zf=3. At z>1, a wider range of formation histories is needed, but higher formation redshifts (i.e., zf>3) are favored for most clusters.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Clusters: General - Surveys

VizieR on-line data: <Available at CDS (J/ApJ/684/905): table1.dat table3.dat>

Nomenclature: Table 1: ISCS JHHMM.m+DDMM N=12. Table 3: [EBG2008] IRAC JHHMMSS.s+DDMMSS N=97, [EBG2008] ser JHHMMSS.s+DDMMSS N=7.

Simbad objects: 123

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Number of rows : 123
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 3007 0
2 Feige 34 HS* 10 39 36.7358839104 +43 06 09.212615280 9.613 10.91 11.14 11.319 11.464 sdOp 688 0
3 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 4823 2
4 HZ 44 HS* 13 23 35.2629445608 +36 07 59.544140304 10.186 11.42 11.65 12.00 11.995 sdBN0VIIHe28 420 0
5 [EBG2008] IRAC J142605.2+340248 GiC 14 26 05.25 +34 02 48.8           ~ 1 0
6 [EBG2008] IRAC J142606.3+340357 GiC 14 26 06.34 +34 03 57.6           ~ 1 0
7 [EBG2008] IRAC J142607.6+340410 GiC 14 26 07.65 +34 04 10.3           ~ 1 0
8 [EBG2008] IRAC J142609.1+340429 GiC 14 26 09.19 +34 04 29.5           ~ 1 0
9 ISCS J1426.1+3403 ClG 14 26 09.51 +34 03 41.1           ~ 9 0
10 [EBG2008] IRAC J142610.1+340322 GiC 14 26 10.12 +34 03 22.1           ~ 1 0
11 [EBG2008] IRAC J142611.7+340459 GiC 14 26 11.72 +34 04 59.4           ~ 1 0
12 [EBG2008] IRAC J142615.4+340449 GiC 14 26 15.47 +34 04 49.6           ~ 1 0
13 [EBG2008] IRAC J142630.1+334038 GiC 14 26 30.14 +33 40 38.2           ~ 1 0
14 ISCS J1426.5+3339 ClG 14 26 30.42 +33 39 33.2           ~ 10 0
15 [EBG2008] IRAC J142631.6+333938 GiC 14 26 31.64 +33 39 38.8           ~ 1 0
16 [EBG2008] IRAC J142631.7+333905 GiC 14 26 31.78 +33 39 05.9           ~ 1 0
17 [EBG2008] IRAC J142634.8+334031 GiC 14 26 34.85 +33 40 31.5           ~ 1 0
18 [EBG2008] IRAC J142635.9+334023 GiC 14 26 35.98 +33 40 23.2           ~ 1 0
19 [EBG2008] ser J142904.4+343536 GiC 14 29 04.49 +34 35 36.3           ~ 1 0
20 [EBG2008] IRAC J142910.9+335721 GiC 14 29 10.90 +33 57 21.0           ~ 1 0
21 [EBG2008] IRAC J142912.9+335808 GiC 14 29 12.94 +33 58 08.5           ~ 1 0
22 [EBG2008] IRAC J142913.1+335724 GiC 14 29 13.12 +33 57 24.6           ~ 1 0
23 [EBG2008] IRAC J142913.4+335700 GiC 14 29 13.42 +33 57 00.7           ~ 1 0
24 [EBG2008] IRAC J142913.9+343705 GiC 14 29 13.96 +34 37 05.2           ~ 2 0
25 [EBG2008] IRAC J142914.6+343726 GiC 14 29 14.65 +34 37 26.0           ~ 2 0
26 [EBG2008] IRAC J142915.0+335725 GiC 14 29 15.12 +33 57 25.9           ~ 2 0
27 ISCS J1429.2+3357 ClG 14 29 15.16 +33 57 08.5           ~ 7 0
28 [EBG2008] IRAC J142916.0+335659 GiC 14 29 16.01 +33 56 59.6           ~ 1 0
29 CXOXB J142916.1+335536 QSO 14 29 16.10184 +33 55 37.4988       22.48 20.85 ~ 7 0
30 [EBG2008] IRAC J142916.8+343657 GiC 14 29 16.89 +34 36 57.9           ~ 1 0
31 [EBG2008] IRAC J142917.5+343708 GiC 14 29 17.58 +34 37 08.3           ~ 1 0
32 ISCS J1429.3+3437 ClG 14 29 18.5 +34 37 25           ~ 20 0
33 [EBG2008] IRAC J142918.9+343654 GiC 14 29 18.94 +34 36 54.9           ~ 1 0
34 [EBG2008] IRAC J142921.9+343801 GiC 14 29 21.98 +34 38 01.2           ~ 1 0
35 SDSS J142925.30+343915.7 QSO 14 29 25.3064934552 +34 39 15.623238420       20.24 20.52 ~ 6 0
36 [EBG2008] IRAC J142927.4+343735 GiC 14 29 27.42 +34 37 35.3           ~ 1 0
37 NAME NOAO Deep Wide Field reg 14 32 05.75 +34 16 47.5           ~ 395 0
38 [EBG2008] IRAC J143224.6+333209 GiC 14 32 24.62 +33 32 09.4           ~ 1 0
39 [EBG2008] IRAC J143226.1+333300 GiC 14 32 26.16 +33 33 00.6           ~ 1 0
40 [EBG2008] IRAC J143226.9+343340 GiC 14 32 26.95 +34 33 40.8           ~ 1 0
41 [EBG2008] IRAC J143228.1+333136 GiC 14 32 28.11 +33 31 36.1           ~ 1 0
42 [EBG2008] ser J143228.7+333210 GiC 14 32 28.75 +33 32 10.0           ~ 1 0
43 [EBG2008] IRAC J143228.9+333040 GiC 14 32 28.91 +33 30 40.4           ~ 2 0
44 ISCS J1432.4+3332 ClG 14 32 29.18 +33 32 36.0           ~ 19 0
45 [EBG2008] IRAC J143229.4+333226 GiC 14 32 29.49 +33 32 26.7           ~ 1 0
46 [EBG2008] IRAC J143229.7+333126 GiC 14 32 29.73 +33 31 26.6           ~ 1 0
47 [EBG2008] IRAC J143229.8+333236 GiC 14 32 29.88 +33 32 36.7           ~ 1 0
48 [EBG2008] IRAC J143230.3+333142 GiC 14 32 30.33 +33 31 42.1           ~ 1 0
49 [EBG2008] IRAC J143230.4+333341 GiC 14 32 30.43 +33 33 41.6           ~ 1 0
50 [EBG2008] IRAC J143230.6+333159 GiC 14 32 30.60 +33 31 59.0           ~ 1 0
51 [EBG2008] IRAC J143232.2+343652 GiC 14 32 32.26 +34 36 52.9           ~ 1 0
52 [EBG2008] IRAC J143232.3+333533 GiC 14 32 32.35 +33 35 33.6           ~ 2 0
53 [EBG2008] IRAC J143232.8+333425 GiC 14 32 32.85 +33 34 25.4           ~ 1 0
54 [EBG2008] IRAC J143233.5+333320 GiC 14 32 33.52 +33 33 20.4           ~ 1 0
55 [EBG2008] IRAC J143234.2+333239 GiC 14 32 34.21 +33 32 39.3           ~ 2 0
56 [EBG2008] IRAC J143234.4+343549 GiC 14 32 34.41 +34 35 49.7           ~ 1 0
57 [EBG2008] IRAC J143236.0+333333 GiC 14 32 36.06 +33 33 33.1           ~ 1 0
58 [EBG2008] IRAC J143236.6+333319 GiC 14 32 36.66 +33 33 19.9           ~ 1 0
59 [EBG2008] IRAC J143237.3+333245 GiC 14 32 37.39 +33 32 45.3           ~ 1 0
60 [EBG2008] IRAC J143237.8+343637 GiC 14 32 37.80 +34 36 37.0           ~ 1 0
61 ISCS J1432.6+3436 ClG 14 32 38.3 +34 36 49           ~ 20 0
62 [EBG2008] IRAC J143238.6+333410 GiC 14 32 38.68 +33 34 10.2           ~ 1 0
63 [EBG2008] IRAC J143238.7+343731 GiC 14 32 38.70 +34 37 31.5           ~ 1 0
64 [EBG2008] IRAC J143238.9+343659 GiC 14 32 38.92 +34 36 59.6           ~ 1 0
65 [EBG2008] IRAC J143239.3+343637 GiC 14 32 39.33 +34 36 37.3           ~ 3 0
66 [EBG2008] IRAC J143239.6+333200 GiC 14 32 39.68 +33 32 00.5           ~ 1 0
67 [EBG2008] ser J143239.7+333200 GiC 14 32 39.75 +33 32 00.8           ~ 1 0
68 [KEC2012] 218.166115+33.504215 QSO 14 32 39.868 +33 30 15.17       21.45 21.07 ~ 2 0
69 [EBG2008] IRAC J143240.1+343751 GiC 14 32 40.18 +34 37 51.4           ~ 1 0
70 [EBG2008] IRAC J143246.7+333330 GiC 14 32 46.72 +33 33 30.7           ~ 1 0
71 [EBG2008] IRAC J143253.8+333353 GiC 14 32 53.82 +33 33 53.2           ~ 1 0
72 [EBG2008] IRAC J143255.3+333316 GiC 14 32 55.33 +33 33 16.8           ~ 1 0
73 [EBG2008] IRAC J143256.4+333351 GiC 14 32 56.46 +33 33 51.4           ~ 1 0
74 [EBG2008] IRAC J143258.6+333345 GiC 14 32 58.66 +33 33 45.3           ~ 1 0
75 [EBG2008] IRAC J143302.3+333355 GiC 14 33 02.34 +33 33 55.5           ~ 1 0
76 [EBG2008] IRAC J143303.4+333327 GiC 14 33 03.40 +33 33 27.5           ~ 1 0
77 [EBG2008] IRAC J143303.6+333638 GiC 14 33 03.61 +33 36 38.4           ~ 1 0
78 [EBG2008] IRAC J143304.1+333330 GiC 14 33 04.12 +33 33 30.0           ~ 1 0
79 [EBG2008] IRAC J143305.4+333347 GiC 14 33 05.41 +33 33 47.8           ~ 1 0
80 ISCS J1433.1+3334 ClG 14 33 06.81 +33 34 14.2           ~ 1 0
81 [EBG2008] IRAC J143307.0+332351 GiC 14 33 07.09 +33 23 51.4           ~ 1 0
82 [EBG2008] IRAC J143307.9+333346 GiC 14 33 07.93 +33 33 46.6           ~ 1 0
83 [EBG2008] IRAC J143308.6+333352 GiC 14 33 08.65 +33 33 52.6           ~ 1 0
84 [EBG2008] IRAC J143309.2+333120 GiC 14 33 09.28 +33 31 20.1           ~ 1 0
85 [EBG2008] ser J143309.9+333346 GiC 14 33 09.92 +33 33 46.2           ~ 1 0
86 [EBG2008] IRAC J143310.2+333345 GiC 14 33 10.21 +33 33 45.7           ~ 1 0
87 [EBG2008] IRAC J143311.4+333351 GiC 14 33 11.47 +33 33 51.8           ~ 1 0
88 SDWFS J143313.39+333510.8 G 14 33 13.39 +33 35 10.8       24.76 24.81 ~ 4 0
89 [EBG2008] IRAC J143313.7+332436 GiC 14 33 13.77 +33 24 36.7           ~ 1 0
90 [EBG2008] IRAC J143315.3+332441 GiC 14 33 15.33 +33 24 41.7           ~ 1 0
91 ISCS J1433.2+3324 ClG 14 33 16.01 +33 24 37.4           ~ 1 0
92 [EBG2008] IRAC J143316.1+333401 GiC 14 33 16.12 +33 34 01.7           ~ 1 0
93 [EBG2008] IRAC J143318.0+333358 GiC 14 33 18.02 +33 33 58.1           ~ 1 0
94 [EBG2008] IRAC J143319.4+333419 GiC 14 33 19.49 +33 34 19.2           ~ 1 0
95 CXOXB J143319.7+332346 AGN 14 33 19.61 +33 23 46.8       22.18 20.99 ~ 5 0
96 [EBG2008] IRAC J143319.9+332427 GiC 14 33 19.93 +33 24 27.6           ~ 1 0
97 [EBG2008] IRAC J143320.9+333410 GiC 14 33 20.94 +33 34 10.4           ~ 1 0
98 [EBG2008] IRAC J143330.4+332644 GiC 14 33 30.40 +33 26 44.6           ~ 1 0
99 [EBG2008] IRAC J143407.7+332434 GiC 14 34 07.70 +33 24 34.0           ~ 1 0
100 [EBG2008] IRAC J143408.4+332828 GiC 14 34 08.45 +33 28 28.5           ~ 1 0
101 [EBG2008] IRAC J143409.0+332827 GiC 14 34 09.09 +33 28 27.1           ~ 1 0
102 ISCS J1434.1+3328 ClG 14 34 10.37 +33 28 18.3           ~ 1 0
103 [EBG2008] IRAC J143410.3+332826 GiC 14 34 10.39 +33 28 26.0           ~ 1 0
104 [EBG2008] IRAC J143411.0+332902 GiC 14 34 11.05 +33 29 02.6           ~ 1 0
105 [EBG2008] IRAC J143412.7+342834 GiC 14 34 12.79 +34 28 34.8           ~ 1 0
106 [EBG2008] IRAC J143413.3+332532 GiC 14 34 13.39 +33 25 32.2           ~ 1 0
107 [EBG2008] ser J143416.3+342822 GiC 14 34 16.34 +34 28 22.9           ~ 1 0
108 ClG J1434+3427 ClG 14 34 28.6 +34 26 22           ~ 22 0
109 ISCS J1434.5+3427 ClG 14 34 30.44 +34 27 12.3           ~ 14 0
110 [EBG2008] IRAC J143431.8+342822 GiC 14 34 31.81 +34 28 22.5           ~ 1 0
111 [EBG2008] IRAC J143434.8+351749 GiC 14 34 34.85 +35 17 49.3           ~ 2 0
112 [EBG2008] IRAC J143436.7+351738 GiC 14 34 36.71 +35 17 38.4           ~ 1 0
113 [EBG2008] ser J143445.2+351942 GiC 14 34 45.28 +35 19 42.5           ~ 1 0
114 [EBG2008] IRAC J143445.3+351942 GiC 14 34 45.36 +35 19 42.6           ~ 1 0
115 [EBG2008] IRAC J143445.9+351953 GiC 14 34 45.90 +35 19 53.3           ~ 1 0
116 ISCS J1434.7+3519 ClG 14 34 46.3 +35 19 45           ~ 20 0
117 [BSV2011] J143808.3+341417 G 14 38 08.36 +34 14 17.8           ~ 2 0
118 ISCS J143809+341419 ClG 14 38 08.71 +34 14 19.2           ~ 34 0
119 [BSV2011] J143810.6+341247 G 14 38 10.64 +34 12 47.3           ~ 2 0
120 [BSV2011] J143815.7+341659 G 14 38 15.79 +34 16 59.4           ~ 2 0
121 [BSV2011] J143816.4+341625 G 14 38 16.41 +34 16 25.7           ~ 2 0
122 [BSV2011] J143816.8+341440 AGN 14 38 16.84 +34 14 40.4           ~ 3 0
123 HD 340611 WD* 20 34 21.8847019255 +25 03 49.750446346 10.687 11.471 11.546 11.648 11.728 DA2.4 312 0

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