2016A&A...592A...8B

Query : 2016A&A...592A...8B

2016A&A...592A...8B - Astronomy and Astrophysics, volume 592A, 8-8 (2016/8-1)

The XXL Survey. IX. Optical overdensity and radio continuum analysis of a supercluster at z = 0.43.

BARAN N., SMOLCIC V., MILAKOVIC D., NOVAK M., DELHAIZE J., GASTALDELLO F., RAMOS-CEJA M.E., PACAUD F., BOURKE S., CARILLI C.L., ETTORI S., HALLINAN G., HORELLOU C., KOULOURIDIS E., CHIAPPETTI L., MIETTINEN O., MELNYK O., MOOLEY K., PIERRE M., POMPEI E. and SCHINNERER E.

Abstract (from CDS):

We present observations with the Karl G. Jansky Very Large Array (VLA) at 3GHz (10 cm) toward a sub-field of the XXL-North 25deg2 field targeting the first supercluster discovered in the XXL Survey. The structure has been found at a spectroscopic redshift of 0.43 and extending over 0.35x0.1 on the sky. The aim of this paper is twofold. First, we present the 3GHz VLA radio continuum observations, the final radio mosaic and radio source catalogue, and, second, we perform a detailed analysis of the supercluster in the optical and radio regimes using photometric redshifts from the CFHTLS survey and our new VLA-XXL data. Our final 3GHz radio mosaic has a resolution of 3.2x1.9, and encompasses an area of 41'x41' with rms noise level lower than ∼20µJy/beam. The noise in the central 15'x15' region is ~=11µJy/beam. From the mosaic we extract a catalogue of 155 radio sources with signal-to-noise ratio (S/N)≥6, eight of which are large, multicomponent sources, and 123 (79%) of which can be associated with optical sources in the CFHTLS W1 catalogue. Applying Voronoi tessellation analysis (VTA) in the area around the X-ray identified supercluster using photometric redshifts from the CFHTLS survey we identify a total of seventeen overdensities at zphot=0.35-0.50, 7 of which are associated with clusters detected in the XMM-Newton XXL data. We find a mean photometric redshift of 0.43 for our overdensities, consistent with the spectroscopic redshifts of the brightest cluster galaxies of seven X-ray detected clusters. The full VTA-identified structure extends over ∼0.6x0.2 on the sky, which corresponds to a physical size of ∼12x4Mpc2 at z=0.43. No large radio galaxies are present within the overdensities, and we associate eight (S/N>7) radio sources with potential group/cluster member galaxies. The spatial distribution of the red and blue VTA-identified potential group member galaxies, selected by their observed g-r colours, suggests that the clusters are not virialised yet, but are dynamically young, as expected for hierarchical structure growth in a ΛCDM universe. Further spectroscopic data are required to analyse the dynamical state of the groups.

Abstract Copyright: © ESO, 2016

Journal keyword(s): catalogs - galaxies: clusters: general - galaxies: groups: general - radio continuum: galaxies

Nomenclature: Table 2: VLA-XXL NNN (Nos 1-155). Fig. 7, Table 3: [BSM2016] VTANN (Nos VTA01-VTA10).

Simbad objects: 159

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Number of rows : 159
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 LEDA 1034224 G 02 09 41.7660224304 -06 19 10.548380928           ~ 3 0
2 VLA-XXL 2 Rad 02 09 42.380 -05 59 42.66           ~ 2 0
3 VLA-XXL 3 Rad 02 09 45.620 -06 18 43.14           ~ 2 0
4 VLA-XXL 4 Rad 02 09 47.750 -06 20 53.02           ~ 2 0
5 VLA-XXL 5 Rad 02 09 48.680 -06 29 41.37           ~ 2 0
6 VLA-XXL 6 Rad 02 09 51.0306004992 -06 06 20.807233740           ~ 2 0
7 VLA-XXL 7 Rad 02 09 51.9187805808 -06 07 11.714283840           ~ 2 0
8 VLA-XXL 8 Rad 02 09 54.420 -05 54 54.17           ~ 2 0
9 LEDA 1036153 G 02 09 56.190 -06 09 16.01           ~ 3 0
10 VLA-XXL 10 Rad 02 09 56.430 -06 04 57.98           ~ 2 0
11 VLA-XXL 11 Rad 02 09 56.530 -06 04 28.04           ~ 2 0
12 VLA-XXL 12 Rad 02 09 56.610 -06 08 04.43           ~ 2 0
13 VLA-XXL 13 Rad 02 09 56.690 -06 25 16.34           ~ 2 0
14 VLA-XXL 14 Rad 02 10 01.540 -06 06 59.94           ~ 2 0
15 VLA-XXL 15 Rad 02 10 03.280 -06 01 28.00           ~ 2 0
16 VLA-XXL 16 Rad 02 10 05.660 -06 11 15.07           ~ 2 0
17 NVSS J021006-063138 Rad 02 10 06.020 -06 31 35.28           ~ 2 0
18 VLA-XXL 18 Rad 02 10 06.650 -06 21 01.93           ~ 2 0
19 VLA-XXL 19 Rad 02 10 07.180 -06 22 20.64           ~ 2 0
20 VLA-XXL 20 Rad 02 10 08.920 -06 13 31.77           ~ 2 0
21 VLA-XXL 21 Rad 02 10 09.390 -06 14 34.48           ~ 2 0
22 VLA-XXL 22 Rad 02 10 10.070 -05 55 20.28           ~ 2 0
23 VLA-XXL 23 Rad 02 10 12.530 -06 01 34.08           ~ 2 0
24 VLA-XXL 24 Rad 02 10 14.540 -06 21 42.07           ~ 2 0
25 VLA-XXL 25 Rad 02 10 14.640 -06 05 21.33           ~ 2 0
26 VLA-XXL 26 Rad 02 10 15.510 -06 13 21.90           ~ 2 0
27 VLA-XXL 27 Rad 02 10 16.370 -06 04 45.07           ~ 2 0
28 VLA-XXL 28 Rad 02 10 16.690 -06 13 19.96           ~ 2 0
29 VLA-XXL 29 Rad 02 10 17.210 -06 13 33.49           ~ 2 0
30 VLA-XXL 30 Rad 02 10 17.820 -06 07 49.67           ~ 2 0
31 VLA-XXL 31 Rad 02 10 18.810 -06 28 20.34           ~ 2 0
32 VLA-XXL 32 Rad 02 10 18.880 -06 10 54.35           ~ 2 0
33 VLA-XXL 33 Rad 02 10 19.280 -06 22 24.55           ~ 2 0
34 VLA-XXL 34 Rad 02 10 20.660 -06 07 38.91           ~ 2 0
35 VLA-XXL 35 Rad 02 10 20.850 -05 56 48.33           ~ 2 0
36 VLA-XXL 36 Rad 02 10 22.350 -06 06 12.96           ~ 2 0
37 VLA-XXL 37 Rad 02 10 22.360 -05 52 50.85           ~ 2 0
38 VLA-XXL 38 Rad 02 10 22.620 -06 10 42.47           ~ 2 0
39 VLA-XXL 39 Rad 02 10 22.730 -05 53 47.83           ~ 2 0
40 VLA-XXL 40 Rad 02 10 23.260 -06 21 31.79           ~ 2 0
41 VLA-XXL 41 Rad 02 10 23.2714627992 -06 01 55.145457768           ~ 2 0
42 VLA-XXL 42 Rad 02 10 23.6043698928 -06 04 09.001892640           ~ 2 0
43 VLA-XXL 43 Rad 02 10 25.330 -06 13 18.47           ~ 2 0
44 VLA-XXL 44 Rad 02 10 26.4109999680 -06 07 37.225046856           ~ 2 0
45 VLA-XXL 45 Rad 02 10 26.9699957640 -06 10 10.556631696           ~ 2 0
46 VLA-XXL 46 Rad 02 10 28.000 -06 00 41.63           ~ 2 0
47 VLA-XXL 47 Rad 02 10 28.020 -05 55 34.42           ~ 2 0
48 VLA-XXL 48 Rad 02 10 31.790 -06 19 19.23           ~ 2 0
49 LEDA 1032953 G 02 10 33.450 -06 25 48.88           ~ 6 0
50 VLA-XXL 50 Rad 02 10 34.900 -06 03 58.89           ~ 2 0
51 VLA-XXL 51 Rad 02 10 35.440 -06 23 29.14           ~ 2 0
52 SDSS J021035.88-061026.0 AGN 02 10 35.886 -06 10 26.10           ~ 5 0
53 VLA-XXL 53 Rad 02 10 36.890 -05 53 09.65           ~ 2 0
54 VLA-XXL 54 Rad 02 10 37.760 -06 08 50.14           ~ 2 0
55 VLA-XXL 55 Rad 02 10 38.710 -06 07 59.10           ~ 2 0
56 NVSS J021039-055637 Rad 02 10 39.77 -05 56 37.0           ~ 3 0
57 VLA-XXL 57 Rad 02 10 40.340 -06 07 15.84           ~ 2 0
58 VLA-XXL 58 Rad 02 10 41.600 -06 06 42.48           ~ 2 0
59 VLA-XXL 59 Rad 02 10 41.740 -06 14 50.64           ~ 2 0
60 VLA-XXL 60 Rad 02 10 42.250 -06 17 37.32           ~ 2 0
61 VLA-XXL 61 Rad 02 10 44.730 -06 09 37.35           ~ 2 0
62 VLA-XXL 62 Rad 02 10 45.990 -06 10 11.14           ~ 2 0
63 VLA-XXL 63 Rad 02 10 46.050 -06 30 28.04           ~ 2 0
64 VLA-XXL 64 Rad 02 10 46.620 -06 23 17.29           ~ 2 0
65 VLA-XXL 65 Rad 02 10 47.430 -06 16 08.15           ~ 2 0
66 VLA-XXL 66 Rad 02 10 48.050 -06 04 22.00           ~ 2 0
67 VLA-XXL 67 Rad 02 10 50.570 -06 25 16.75           ~ 2 0
68 VLA-XXL 68 Rad 02 10 51.460 -06 11 06.01           ~ 2 0
69 VLA-XXL 69 Rad 02 10 54.1859746536 -06 15 28.970198820           ~ 2 0
70 NVSS J021055-055959 Rad 02 10 55.180 -05 59 56.73           ~ 2 0
71 VLA-XXL 71 Rad 02 10 56.260 -06 13 49.83           ~ 2 0
72 DES J021056.78-061158.0 GiC 02 10 56.785 -06 11 57.99           ~ 4 0
73 VLA-XXL 73 Rad 02 10 57.340 -06 27 04.83           ~ 2 0
74 VLA-XXL 74 Rad 02 10 57.650 -06 13 27.77           ~ 2 0
75 DES J021057.88-061400.6 GiC 02 10 57.880 -06 14 00.62           ~ 3 0
76 VLA-XXL 76 Rad 02 10 58.660 -06 22 45.94           ~ 2 0
77 VLA-XXL 77 Rad 02 10 59.430 -06 11 13.65           ~ 2 0
78 VLA-XXL 78 Rad 02 11 00.060 -06 05 03.88           ~ 2 0
79 VLA-XXL 79 Rad 02 11 00.700 -06 15 16.57           ~ 2 0
80 FIRST J021101.0-060916 X 02 11 01.075 -06 09 17.03           ~ 3 0
81 VLA-XXL 81 Rad 02 11 02.490 -06 18 27.83           ~ 2 0
82 VLA-XXL 82 Rad 02 11 03.140 -06 18 24.45           ~ 2 0
83 VLA-XXL 83 Rad 02 11 03.150 -06 10 17.87           ~ 2 0
84 VLA-XXL 84 Rad 02 11 06.610 -05 59 30.53           ~ 2 0
85 VLA-XXL 85 Rad 02 11 07.340 -06 13 14.09           ~ 2 0
86 VLA-XXL 86 Rad 02 11 08.160 -05 58 15.37           ~ 2 0
87 VLA-XXL 87 Rad 02 11 08.730 -06 10 10.38           ~ 2 0
88 VLA-XXL 88 Rad 02 11 09.490 -06 04 39.97           ~ 2 0
89 VLA-XXL 89 Rad 02 11 10.120 -06 04 31.82           ~ 2 0
90 VLA-XXL 90 Rad 02 11 12.690 -06 27 47.88           ~ 2 0
91 VLA-XXL 91 Rad 02 11 12.890 -05 54 45.10           ~ 2 0
92 VLA-XXL 92 Rad 02 11 13.230 -06 05 28.35           ~ 2 0
93 VLA-XXL 93 Rad 02 11 13.860 -06 09 39.96           ~ 2 0
94 VLA-XXL 94 Rad 02 11 14.500 -06 19 11.30           ~ 2 0
95 VLA-XXL 95 Rad 02 11 14.620 -06 22 16.01           ~ 2 0
96 VLA-XXL 96 Rad 02 11 17.090 -06 24 39.90           ~ 2 0
97 VLA-XXL 97 Rad 02 11 18.370 -06 21 23.21           ~ 2 0
98 VLA-XXL 98 Rad 02 11 19.160 -06 21 09.08           ~ 2 0
99 VLA-XXL 99 Rad 02 11 20.330 -06 14 36.95           ~ 2 0
100 VLA-XXL 100 Rad 02 11 21.880 -06 07 39.38           ~ 2 0
101 VLA-XXL 101 Rad 02 11 23.650 -06 05 22.35           ~ 2 0
102 VLA-XXL 102 Rad 02 11 24.7543126824 -06 03 43.387537572           ~ 2 0
103 VLA-XXL 103 Rad 02 11 25.000 -06 10 09.26           ~ 2 0
104 VLA-XXL 104 Rad 02 11 25.290 -05 59 49.68           ~ 2 0
105 VLA-XXL 105 Rad 02 11 26.710 -06 11 05.57           ~ 2 0
106 VLA-XXL 106 Rad 02 11 27.3667561440 -06 06 48.953002104           ~ 2 0
107 VLA-XXL 107 Rad 02 11 27.720 -06 07 08.00           ~ 2 0
108 VLA-XXL 108 Rad 02 11 28.170 -06 03 52.05           ~ 2 0
109 VLA-XXL 109 Rad 02 11 28.530 -06 11 48.54           ~ 2 0
110 [PCG2016] XLSSC-e SCG 02 11.5 -06 12           ~ 3 0
111 VLA-XXL 110 Rad 02 11 30.220 -06 25 53.48           ~ 2 0
112 VLA-XXL 111 Rad 02 11 30.860 -06 15 21.94           ~ 2 0
113 VLA-XXL 112 Rad 02 11 30.950 -06 12 25.60           ~ 2 0
114 VLA-XXL 113 Rad 02 11 31.180 -06 08 32.21           ~ 2 0
115 VLA-XXL 114 Rad 02 11 31.270 -06 14 16.84           ~ 2 0
116 GAMA J021132.12-061248.8 G 02 11 32.150 -06 12 49.11           ~ 4 0
117 VLA-XXL 116 Rad 02 11 32.200 -06 22 33.88           ~ 2 0
118 VLA-XXL 117 Rad 02 11 35.0317144152 -06 08 26.101588128           ~ 2 0
119 VLA-XXL 118 Rad 02 11 35.090 -06 23 22.50           ~ 2 0
120 VLA-XXL 119 Rad 02 11 36.620 -05 59 26.76           ~ 2 0
121 VLA-XXL 121 Rad 02 11 37.260 -06 25 34.04           ~ 2 0
122 NVSS J021137-060137 Rad 02 11 37.262 -06 01 29.36           ~ 2 0
123 VLA-XXL 122 Rad 02 11 37.350 -06 09 24.36           ~ 2 0
124 VLA-XXL 123 Rad 02 11 38.730 -06 25 20.42           ~ 2 0
125 VLA-XXL 124 Rad 02 11 38.940 -05 59 39.42           ~ 2 0
126 VLA-XXL 125 Rad 02 11 39.950 -06 06 42.92           ~ 2 0
127 VLA-XXL 126 Rad 02 11 40.290 -06 17 05.08           ~ 2 0
128 VLA-XXL 127 Rad 02 11 41.490 -05 56 25.02           ~ 2 0
129 VLA-XXL 128 Rad 02 11 42.620 -06 16 52.74           ~ 2 0
130 VLA-XXL 129 Rad 02 11 43.160 -06 06 31.60           ~ 2 0
131 VLA-XXL 130 Rad 02 11 43.290 -05 57 36.39           ~ 2 0
132 VLA-XXL 131 Rad 02 11 44.040 -06 06 52.47           ~ 2 0
133 LEDA 1033495 G 02 11 44.1155512704 -06 23 00.708896904           ~ 3 0
134 VLA-XXL 133 Rad 02 11 44.230 -06 10 18.58           ~ 2 0
135 VLA-XXL 134 Rad 02 11 46.090 -06 16 36.59           ~ 2 0
136 VLA-XXL 135 Rad 02 11 47.460 -06 12 35.14           ~ 2 0
137 VLA-XXL 136 Rad 02 11 48.440 -05 57 11.55           ~ 2 0
138 VLA-XXL 137 Rad 02 11 48.650 -06 13 27.89           ~ 2 0
139 VLA-XXL 138 Rad 02 11 48.770 -06 22 49.52           ~ 2 0
140 VLA-XXL 139 Rad 02 11 52.270 -06 09 55.85           ~ 2 0
141 VLA-XXL 140 Rad 02 11 52.810 -06 18 53.97           ~ 2 0
142 VLA-XXL 141 Rad 02 11 54.230 -06 03 59.92           ~ 2 0
143 VLA-XXL 142 Rad 02 11 54.750 -05 59 27.61           ~ 2 0
144 VLA-XXL 143 Rad 02 11 57.510 -06 02 16.37           ~ 2 0
145 VLA-XXL 144 Rad 02 12 00.590 -06 02 00.66           ~ 2 0
146 VLA-XXL 145 Rad 02 12 00.760 -06 20 28.39           ~ 2 0
147 VLA-XXL 146 Rad 02 12 01.470 -06 24 15.08           ~ 2 0
148 VLA-XXL 147 Rad 02 12 02.600 -06 03 40.24           ~ 2 0
149 VLA-XXL 148 Rad 02 12 05.140 -06 24 17.29           ~ 2 0
150 VLA-XXL 149 Rad 02 12 06.040 -06 03 27.59           ~ 2 0
151 VLA-XXL 150 Rad 02 12 07.440 -06 14 36.49           ~ 2 0
152 VLA-XXL 151 Rad 02 12 07.600 -06 01 14.73           ~ 2 0
153 SDSS J021207.85-060725.6 QSO 02 12 07.850 -06 07 25.50           ~ 8 0
154 VLA-XXL 153 Rad 02 12 09.480 -06 24 53.14           ~ 2 0
155 VLA-XXL 154 Rad 02 12 09.510 -06 12 47.13           ~ 2 0
156 VLA-XXL 155 Rad 02 12 11.560 -06 14 00.70           ~ 2 0
157 NGC 1052 Sy2 02 41 04.79849989 -08 15 20.7519527 11.84 11.41 10.47 10.71   ~ 1298 2
158 NAME HOR-RET SUPERCL SCG 03 16 -48.0           ~ 62 3
159 ICRF J052109.8+163822 Sy1 05 21 09.88596258 +16 38 22.0515459   19.37 18.84 18.480   ~ 851 1

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