2012ApJ...749..169G

Query : 2012ApJ...749..169G

2012ApJ...749..169G - Astrophys. J., 749, 169 (2012/April-3)

The mid-infrared environments of high-redshift radio galaxies.

GALAMETZ A., STERN D., DE BREUCK C., HATCH N., MAYO J., MILEY G., RETTURA A., SEYMOUR N., STANFORD S.A. and VERNET J.

Abstract (from CDS):

Taking advantage of the impressive sensitivity of Spitzer to detect massive galaxies at high redshift, we study the mid-infrared environments of powerful, high-redshift radio galaxies at 1.2 < z < 3. Galaxy cluster member candidates were isolated using a single Spitzer/IRAC mid-infrared color criterion, [3.6]-[4.5] > -0.1 (AB), in the fields of 48 radio galaxies at 1.2 < z < 3. Using a counts-in-cell analysis, we identify a field as overdense when 15 or more red IRAC sources are found within 1' (i.e., 0.5 Mpc at 1.2 < z < 3) of the radio galaxy to the 5σ flux density limits of our IRAC data (f4.5= 13.4 µJy). We find that radio galaxies lie preferentially in medium to dense regions, with 73% of the targeted fields denser than average. Our (shallow) 120 s data permit the rediscovery of previously known clusters and protoclusters associated with radio galaxies as well as the discovery of new promising galaxy cluster candidates at z > 1.2.

Abstract Copyright: ∼

Journal keyword(s): galaxies: active - galaxies: clusters: general - galaxies: high-redshift - infrared: galaxies

Simbad objects: 80

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Number of rows : 80
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 NVSS J003453+413132 rG 00 34 53.08 +41 31 31.5           ~ 21 1
2 SpARCS J003550-431224 ClG 00 35 50.0 -43 12 24           ~ 35 0
3 PMN J0039-2534 rG 00 39 56.412 -25 34 31.00           ~ 16 1
4 NVSS J010118+495011 rG 01 01 18.86 +49 50 12.3           ~ 11 1
5 PKS 0114-21 rG 01 16 51.40488104 -20 52 06.8906316     16.5     ~ 91 1
6 NVSS J012142+132058 rG 01 21 42.695 +13 20 58.10           ~ 43 1
7 NVSS J013530+331702 rG 01 35 30.39 +33 17 00.8           ~ 14 1
8 NVSS J014343+325349 rG 01 43 43.85 +32 53 49.7         24 ~ 37 1
9 MRC 0152-209 rG 01 54 55.767 -20 40 26.29           ~ 41 2
10 MRC 0156-252 rG 01 58 33.480 -24 59 32.01   22.7       ~ 58 1
11 NVSS J020510+224250 rG 02 05 10.606 +22 42 49.68           ~ 34 1
12 PKS J0213-2525 rG 02 13 30.543 -25 25 19.44           ~ 15 1
13 PMN J0214-1158 rG 02 14 17.4 -11 58 47           ~ 63 1
14 NAME XMM-LSS Field reg 02 18 00 -07 00.0           ~ 347 0
15 ClG J0218-0510 ClG 02 18 21.3 -05 10 27           ~ 82 0
16 PMN J0253-2708 rG 02 53 16.744 -27 09 13.03           ~ 24 1
17 PKS J0318-2535 rG 03 18 12.091 -25 35 09.37   23.6 23.8     ~ 81 2
18 PKS J0327-2239 rG 03 27 04.68 -22 39 47.2           ~ 24 1
19 PMN J0352-2749 rG 03 52 51.642 -27 49 22.63           ~ 19 1
20 TXS 0406-244 QSO 04 08 51.463920 -24 18 16.40880     22.40     ~ 82 1
21 4C 60.07 rG 05 12 55.086 +60 30 52.78           ~ 91 1
22 LEDA 2824392 QSO 05 30 25.51 -54 54 23.2           ~ 50 2
23 [DVR2000] WN J0617+5012 rG 06 17 39.37 +50 12 54.7           ~ 15 0
24 4C 41.17 rG 06 50 52.098 +41 30 30.53           ~ 349 1
25 NVSS J074729+365438 rG 07 47 29.377 +36 54 38.06           ~ 20 1
26 NVSS J082348+363245 rG 08 23 48.62 +36 32 30.1           ~ 23 1
27 NVSS J082838+252827 rG 08 28 38.681 +25 28 27.77           ~ 21 1
28 NVSS J083053+191314 rG 08 30 53.507 +19 13 15.49           ~ 74 1
29 NVSS J090432+353903 rG 09 04 32.403 +35 39 03.25   21.4       ~ 28 1
30 NVSS J090530+340756 rG 09 05 30.101 +34 07 56.90   24.0 23.800 23.500   ~ 163 1
31 4C 39.24 rG 09 08 13.292 +39 43 28.60           ~ 69 1
32 GLEAM J092419-220140 QSO 09 24 19.92000 -22 01 41.4984       25.850   ~ 90 1
33 NVSS J093306+384150 rG 09 33 06.9294 +38 41 48.173           ~ 32 1
34 PMN J0945-2429 rG 09 45 32.6 -24 28 50           ~ 101 1
35 3C 239 rG 10 11 45.639 +46 28 20.45   22.5       ~ 158 1
36 4C 05.41 rG 10 19 33.424 +05 34 34.83   20.0       ~ 46 1
37 PKS J1019-2220 rG 10 19 49.02531600 -22 19 59.8055880           ~ 29 1
38 NVSS J111506+501624 rG 11 15 06.875 +50 16 23.98           ~ 17 1
39 3C 257 rG 11 23 09.062 +05 30 20.58           ~ 92 1
40 B2 1121+31 B Rad 11 23 55.85 +31 41 26.1           ~ 21 0
41 PKS J1140-2628 rG 11 40 48.35884 -26 29 08.6316     22.00     ~ 325 1
42 3C 266 rG 11 45 43.384 +49 46 07.90   22       ~ 150 1
43 7C 1218+3359 QSO 12 20 33.8756544048 +33 43 12.026168040   18.80 18.61     ~ 271 1
44 4C 39.37 rG 12 35 04.577 +39 25 41.33   21.4       ~ 70 1
45 4C 03.24 rG 12 45 38.375 +03 23 20.05           ~ 79 1
46 PMN J1326-2631 rG 13 26 54.683 -26 31 42.05           ~ 17 1
47 [DBC2004] M03 rG 13 38 26.05 -19 42 30.5       22.4   ~ 106 0
48 4C 24.28 rG 13 48 14.890 +24 15 50.34     17.7     ~ 48 1
49 3C 294 rG 14 06 44.317 +34 11 30.19           ~ 234 1
50 4C -00.54 rG 14 13 15.65 -00 23 07.4           ~ 52 1
51 [RLM94] 1425-148 Rad 14 28 41.70 -15 02 28.4           ~ 8 1
52 NAME NOAO Deep Wide Field reg 14 32 05.75 +34 16 47.5           ~ 430 0
53 4C 63.20 rG 14 36 37.366 +63 19 13.03         23.6 ~ 80 1
54 ClG J1449+0856 ClG 14 49.0 +08 56           ~ 70 0
55 4C -00.62 rG 16 01 17.5 -00 28 47           ~ 75 1
56 SpARCS J161037+552417 ClG 16 10 36.50 +55 24 16.6           ~ 2 0
57 4C 10.48 rG 17 10 06.549 +10 31 06.19           ~ 39 1
58 6C 171301+501842 Sy2 17 14 14.758 +50 15 30.46   24.05   22.64   ~ 110 1
59 WSTB 53W91 rG 17 22 32.73 +50 06 01.9           ~ 79 0
60 3C 356 QSO 17 24 20.232 +50 57 14.47   21.5 21.5     ~ 225 1
61 7C 1751+6809 rG 17 50 49.859 +68 08 25.97           ~ 15 0
62 NVSS J175705+651953 rG 17 57 05.26 +65 19 53.2           ~ 30 2
63 3C 368.0 rG 18 05 06.358 +11 01 32.55   21.5       ~ 253 1
64 NVSS J180556+633313 rG 18 05 57.100 +63 33 13.93           ~ 21 1
65 3C 372 rG 18 10 55.697 +40 45 23.63   22.1       ~ 70 1
66 NAME TX J1908+7220 rG 19 08 22.87 +72 20 09.7           ~ 57 1
67 NVSS J191149+634209 Rad 19 11 49.459 +63 42 08.79           ~ 16 1
68 GLEAM J200753-131643 QSO 20 07 53.253 -13 16 43.62           ~ 27 1
69 LEDA 2830476 Sy1 20 27 59.395 -21 40 57.18   22.4       ~ 77 1
70 PMN J2051-2702 rG 20 51 03.590 -27 03 02.52           ~ 37 1
71 PMN J2106-2404 rG 21 06 58.463 -24 05 06.11   23.0       ~ 79 2
72 4C 23.56 rG 21 07 15.080 +23 31 43.71           ~ 117 1
73 PMN J2142-2858 rG 21 42 16.675 -28 58 40.41           ~ 16 1
74 4C 19.71 rG 21 44 07.54 +19 29 14.9           ~ 51 1
75 NVSS J220514+130533 rG 22 05 14.365 +13 05 32.52           ~ 24 1
76 NVSS J222743-270501 rG 22 27 43.2 -27 05 02           ~ 30 1
77 LEDA 2831610 rG 23 08 25.2 +03 37 04           ~ 14 1
78 NVSS J233024+392711 rG 23 30 24.94 +39 27 12.0   24.70 23.97     ~ 56 2
79 4C 28.58 rG 23 51 59.232 +29 10 29.03           ~ 43 1
80 3C 470.0 rG 23 58 35.340 +44 04 38.89   22.5       ~ 114 1

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