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 z_phot=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

Full paper

View the references in ADS

Number of rows : 159

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Sp type	#ref 1850 - 2023	#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					~	7	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	GiP	02 41 04.79849989	-08 15 20.7519527	11.84	11.41	10.47	10.71	~	1260	2
158	NAME HOR-RET SUPERCL	SCG	03 16	-48.0					~	61	3
159	ICRF J052109.8+163822	Sy1	05 21 09.88596258	+16 38 22.0515459		19.37	18.84	18.480	~	822	1

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