2010ApJ...711.1185D

Query : 2010ApJ...711.1185D

2010ApJ...711.1185D - Astrophys. J., 711, 1185-1197 (2010/March-2)

Spectroscopic confirmation of three red-sequence selected galaxy clusters at z = 0.87, 1.16, and 1.21 from the SpARCS survey.

DEMARCO R., WILSON G., MUZZIN A., LACY M., SURACE J., YEE H.K.C., HOEKSTRA H., BLINDERT K. and GILBANK D.

Abstract (from CDS):

The Spitzer Adaptation of the Red-sequence Cluster Survey (SpARCS) is a z'-passband imaging survey of the 50 deg2 Spitzer SWIRE Legacy fields, designed with the primary aim of creating the first large, homogeneously selected sample of massive clusters at z > 1. SpARCS uses an infrared adaptation of the two-filter cluster red-sequence technique. In this paper, we report Keck/LRIS spectroscopic confirmation of two new exceptionally rich galaxy clusters, SpARCS J161315+564930 at z = 0.871±0.002, with 14 high-confidence members and a rest-frame velocity dispersion of σv= 1230±320 km/s, and SpARCS J161641+554513 at z = 1.161±0.003, with seven high-confidence members (including one active galactic nucleus) and a rest-frame velocity dispersion of σv= 950±330 km/s. We also report confirmation of a third new system, SpARCS J161037+552417 at z = 1.210±0.002, with seven high-confidence members and a rest-frame velocity dispersion of σ_ v_= 410±300 km/s. These three new spectroscopically confirmed clusters further demonstrate the efficiency and effectiveness of two-filter imaging for detecting bona fide galaxy clusters at high redshift. We conclude by demonstrating that prospects are good for the current generation of surveys aiming to estimate cluster redshifts and masses at z ≳ 1 directly from optical-infrared imaging.

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Journal keyword(s): galaxies: clusters: general - galaxies: clusters: individual (SpARCS J161315+564930, SpARCS J161037+552417, SpARCS J161641+554513) - galaxies: evolution - galaxies: formation

Nomenclature: Table 1: SpARCS JHHMMSS+DDMMSS N=3. Tables 2-4: [DWM2010] NNNNNNN N=22+19+34 among (Nos 708779-4000032).

Simbad objects: 90

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Number of rows : 90
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 SpARCS J003550-431224 ClG 00 35 50.0 -43 12 24           ~ 35 0
2 ClG J0849+4452 ClG 08 48 58.8 +44 51 53           ~ 107 1
3 ClG J0910+5422 ClG 09 10 44.9 +54 22 09           ~ 94 0
4 Feige 34 HS* 10 39 36.7358839104 +43 06 09.212615280 9.613 10.91 11.14 11.319 11.464 sdOp 731 0
5 ClG 1054-03 ClG 10 57 00.2 -03 37 27     22     ~ 458 0
6 BD+18 2647 HS* 12 41 51.7899961800 +17 31 19.750566756 10.261 11.70 11.63 11.969 12.159 sdOpec 185 1
7 ClG J1252-2927 ClG 12 52 54.4 -29 27 17           ~ 158 0
8 ELAIS N1 reg 16 10 01 +54 30.6           ~ 489 0
9 [DWM2010] 744358 G 16 10 18.82 +55 27 25.6           ~ 1 0
10 [DWM2010] 714998 G 16 10 21.79 +55 22 54.6           ~ 1 0
11 HSCS J161024.67+552217.3 G 16 10 24.67 +55 22 17.4           ~ 2 0
12 [DWM2010] 4000032 G 16 10 25.09 +55 22 18.6           ~ 1 0
13 [DWM2010] 710318 G 16 10 25.18 +55 22 14.3           ~ 1 0
14 [DWM2010] 4000026 G 16 10 25.62 +55 28 30.7           ~ 1 0
15 [DWM2010] 751852 G 16 10 25.75 +55 28 35.3           ~ 1 0
16 [DWM2010] 4000015 G 16 10 26.28 +55 27 11.2           ~ 1 0
17 [DWM2010] 708779 G 16 10 27.38 +55 21 59.6           ~ 1 0
18 [DWM2010] 709346 G 16 10 27.72 +55 22 04.8           ~ 1 0
19 [DWM2010] 718577 G 16 10 28.66 +55 23 27.8           ~ 1 0
20 [DWM2010] 747661 G 16 10 29.16 +55 27 55.7           ~ 1 0
21 HSCS J161031.29+552847.8 G 16 10 31.30 +55 28 47.7           ~ 2 0
22 [DWM2010] 712763 G 16 10 31.39 +55 22 35.7           ~ 1 0
23 HSCS J161031.80+552406.7 G 16 10 31.80 +55 24 06.8           ~ 2 0
24 [DWM2010] 738292 G 16 10 32.54 +55 26 28.3           ~ 1 0
25 HSCS J161033.95+552344.2 G 16 10 33.94 +55 23 44.3           ~ 2 0
26 [DWM2010] 723736 G 16 10 35.19 +55 24 15.6           ~ 1 0
27 [DWM2010] 4000012 G 16 10 36.43 +55 24 14.8           ~ 1 0
28 SpARCS J161037+552417 ClG 16 10 36.50 +55 24 16.6           ~ 2 0
29 HSCS J161036.54+552416.5 G 16 10 36.53 +55 24 16.6           ~ 2 0
30 [DWM2010] 4000013 G 16 10 36.54 +55 24 19.3           ~ 1 0
31 [DWM2010] 745152 G 16 10 38.47 +55 27 32.8           ~ 1 0
32 [DWM2010] 730800 G 16 10 39.62 +55 25 20.1           ~ 1 0
33 [DWM2010] 734249 G 16 10 39.96 +55 25 50.8           ~ 1 0
34 HSCS J161040.26+552406.1 G 16 10 40.25 +55 24 06.2           ~ 2 0
35 [DWM2010] 4000010 G 16 10 40.86 +55 23 35.0           ~ 1 0
36 HSCS J161042.82+552708.0 G 16 10 42.82 +55 27 07.9           ~ 2 0
37 [DWM2010] 727869 G 16 10 43.90 +55 24 52.8           ~ 1 0
38 [DWM2010] 735789 G 16 10 46.32 +55 26 05.3           ~ 1 0
39 [DWM2010] 740510 G 16 10 46.34 +55 26 49.3           ~ 1 0
40 [DWM2010] 725337 G 16 10 47.04 +55 24 30.0           ~ 1 0
41 [DWM2010] 728525 G 16 10 47.47 +55 24 59.6           ~ 1 0
42 [DWM2010] 737166 G 16 10 50.23 +55 26 18.1           ~ 1 0
43 [DWM2010] 734082 G 16 10 51.86 +55 25 49.6           ~ 1 0
44 [DWM2010] 1067689 G 16 13 05.45 +56 47 30.0           ~ 1 0
45 [DWM2010] 1070036 G 16 13 05.71 +56 49 01.7           ~ 1 0
46 [DWM2010] 1074041 G 16 13 08.93 +56 51 44.0           ~ 1 0
47 [DWM2010] 1072364 G 16 13 10.92 +56 50 33.8           ~ 1 0
48 [DWM2010] 1072641 G 16 13 12.36 +56 50 45.5           ~ 1 0
49 [DWM2010] 1073458 G 16 13 12.62 +56 51 20.6           ~ 1 0
50 SpARCS J161315+564930 ClG 16 13 14.60 +56 49 29.9           ~ 18 0
51 [DWM2010] 1070775 G 16 13 14.62 +56 49 29.9           ~ 1 0
52 [DWM2010] 2000012 G 16 13 14.66 +56 49 33.8           ~ 1 0
53 [DWM2010] 1071085 G 16 13 14.88 +56 49 41.3           ~ 1 0
54 [DWM2010] 1069395 G 16 13 17.18 +56 48 36.7           ~ 1 0
55 [DWM2010] 1071481 G 16 13 17.71 +56 49 56.6           ~ 1 0
56 [DWM2010] 1070485 G 16 13 18.84 +56 49 17.7           ~ 1 0
57 [DWM2010] 1068289 G 16 13 21.29 +56 47 52.6           ~ 1 0
58 [DWM2010] 1068630 G 16 13 21.29 +56 48 07.2           ~ 1 0
59 [DWM2010] 1069805 G 16 13 22.15 +56 48 51.9           ~ 1 0
60 [DWM2010] 1071707 G 16 13 22.27 +56 50 06.8           ~ 1 0
61 [DWM2010] 1065709 G 16 13 22.75 +56 46 18.8           ~ 1 0
62 [DWM2010] 2000007 G 16 13 22.76 +56 46 21.1           ~ 1 0
63 [DWM2010] 2000006 G 16 13 22.84 +56 46 17.3           ~ 1 0
64 [DWM2010] 1066059 G 16 13 24.10 +56 46 30.1           ~ 1 0
65 [DWM2010] 1072162 G 16 13 26.40 +56 50 25.6           ~ 1 0
66 [DWM2010] 1066451 G 16 13 34.13 +56 46 43.6           ~ 1 0
67 [DWM2010] 842789 G 16 16 36.07 +55 43 56.7           ~ 1 0
68 [DWM2010] 833647 G 16 16 39.19 +55 42 15.9           ~ 1 0
69 HSCS J161641.24+554525.5 G 16 16 41.23 +55 45 25.7           ~ 2 0
70 SpARCS J161641+554513 ClG 16 16 41.30 +55 45 12.5           ~ 26 0
71 [DWM2010] 851794 G 16 16 41.59 +55 45 33.4           ~ 1 0
72 [DWM2010] 849838 G 16 16 41.62 +55 45 12.9           ~ 1 0
73 HSCS J161642.32+554454.0 G 16 16 42.31 +55 44 54.2           ~ 2 0
74 [DWM2010] 860365 G 16 16 43.56 +55 47 10.1           ~ 1 0
75 [DWM2010] 856147 G 16 16 44.47 +55 46 21.9           ~ 1 0
76 HSCS J161644.66+554551.6 G 16 16 44.66 +55 45 51.8           ~ 2 0
77 [DWM2010] 857305 G 16 16 45.17 +55 46 34.7           ~ 1 0
78 HSCS J161646.21+554505.0 G 16 16 46.22 +55 45 05.0           ~ 2 0
79 WISE J161652.04+554607.6 G 16 16 52.04315 +55 46 07.6582           ~ 2 0
80 [DWM2010] 844301 G 16 16 52.34 +55 44 13.0           ~ 1 0
81 [DWM2010] 828383 G 16 16 55.13 +55 41 18.9           ~ 1 0
82 HSCS J161701.28+554435.2 G 16 17 01.27 +55 44 35.3           ~ 2 0
83 [DWM2010] 840274 G 16 17 02.93 +55 43 28.4           ~ 1 0
84 [DWM2010] 837239 G 16 17 04.61 +55 42 55.9           ~ 1 0
85 [DWM2010] 3000009 G 16 17 04.64 +55 42 57.3           ~ 1 0
86 [DWM2010] 839226 G 16 17 05.19 +55 43 16.8           ~ 1 0
87 SpARCS J163437+402149 ClG 16 34 35.0 +40 21 51           ~ 25 0
88 SpARCS J163852+403843 ClG 16 38 52.0 +40 38 43           ~ 27 0
89 ClG J2215-1738 ClG 22 15 58.5 -17 38 03           ~ 106 0
90 ClG J2235-2557 ClG 22 35 20.6 -25 57 42           ~ 151 0

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