2007A&A...467...37B

Query : 2007A&A...467...37B

2007A&A...467...37B - Astronomy and Astrophysics, volume 467, 37-48 (2007/5-3)

Internal dynamics of the radio halo cluster Abell 773: a multiwavelength analysis.

BARRENA R., BOSCHIN W., GIRARDI M. and SPOLAOR M.

Abstract (from CDS):

To conduct an intensive study of the rich, X-ray luminous galaxy cluster Abell 773 at z=0.22 containing a diffuse radio halo to determine its dynamical status.Our analysis is based on new spectroscopic data obtained at the TNG telescope for 107 galaxies, 37 spectra recovered from the CFHT archive and new photometric data obtained at the Isaac Newton Telescope. We use statistical tools to select 100 cluster members (out to ∼1.8h70–1Mpc from the cluster centre), to analyse the kinematics of cluster galaxies and to determine the cluster structure. Our analysis is also performed by using X-ray data stored in the Chandra archive. The 2D distribution shows two significant peaks separated by ∼2' in the EW direction with the main western one closely located at the position of the two dominant galaxies and the X-ray peak. The velocity distribution of cluster galaxies shows two peaks at v∼65000 and ∼67500km/s, corresponding to the velocities of the two dominant galaxies. The low velocity structure has a high velocity dispersion - σv=800-1100km/s - and its galaxies are centred on the western 2D peak. The high velocity structure has intermediate velocity dispersion - σv∼500km/s - and is characterized by a complex 2D structure with a component centred on the western 2D peak and a component centred on the eastern 2D peak, these components probably being two independent groups. We estimate a cluster mass within 1 h70–1Mpc of 6-11x1014h70–1M☉. Our analysis of Chandra data shows the presence of two very close peaks in the core and the elongation of the X-ray emission in the NEE-SWW direction. Our results suggest we are looking at probably two groups in an advanced stage of merging with a main cluster and having an impact velocity Δvrf∼2300km/s. In particular, the radio halo seems to be related to the merger of the eastern group.

Abstract Copyright: ∼

Journal keyword(s): galaxies: clusters: general - galaxies: clusters: individual: Abell 773 - galaxies: distances and redshifts - cosmology: observations

VizieR on-line data: <Available at CDS (J/A+A/467/37): table1.dat>

Nomenclature: Table 1: [BBG2007] NNN or [BBG2007] FNNN N=100+42.

CDS comments: Dominant galaxies D1 and D2 are respectively [BBG2007] 59 AND 60.

Simbad objects: 156

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Number of rows : 156
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 ACO 2744 ClG 00 14 20.03 -30 23 17.8           ~ 812 0
2 ACO 85 ClG 00 41 36.21 -09 19 30.4           ~ 909 0
3 ACO 87 ClG 00 43 01 -09 47.6           ~ 46 0
4 ACO 209 ClG 01 31 52.9 -13 36 53           ~ 295 0
5 ACO 3391 ClG 06 26 15.4 -53 40 52           ~ 202 1
6 ACO 3395 ClG 06 27 31.1 -54 23 58           ~ 209 0
7 ACO 746 ClG 09 09 34.7638 +51 32 56.134           ~ 41 0
8 [BBG2007] J091700.6+514252 G 09 17 00.60 +51 42 52.6   19.77   18.36   ~ 1 0
9 [BBG2007] J091706.5+514407 GiC 09 17 06.58 +51 44 07.1   20.54   18.86   ~ 1 0
10 [BBG2007] J091713.8+514317 G 09 17 13.85 +51 43 17.0   22.05   19.88   ~ 1 0
11 SDSS J091714.08+514339.2 GiC 09 17 14.0920 +51 43 39.360   21.24   19.29   ~ 4 0
12 [BBG2007] J091714.5+514328 GiC 09 17 14.50 +51 43 28.2   21.73   20.46   ~ 1 0
13 [BBG2007] J091717.2+514443 G 09 17 17.21 +51 44 43.4   22.72   19.95   ~ 1 0
14 [BBG2007] 7 GiC 09 17 19.7560 +51 38 49.019   21.38   19.39   ~ 2 0
15 2XMM J091720.7+513846 GiC 09 17 20.8133649600 +51 38 45.220015752   19.63   18.19   ~ 2 0
16 [BBG2007] 9 GiC 09 17 23.0295 +51 41 19.260   22.50   20.17   ~ 2 0
17 [BBG2007] 10 GiC 09 17 23.1299 +51 40 52.000   22.46   20.09   ~ 2 0
18 [BBG2007] 11 GiC 09 17 24.05 +51 38 15.4   20.67   19.29   ~ 1 0
19 [BBG2007] 12 GiC 09 17 26.59 +51 43 40.4   21.00   19.47   ~ 1 0
20 [BBG2007] F013 G 09 17 27.8420 +51 37 33.419   20.53   18.27   ~ 2 0
21 [BBG2007] J091728.7+514350 GiC 09 17 28.75 +51 43 50.2   21.39   20.33   ~ 1 0
22 SDSS J091728.79+514223.6 GiC 09 17 28.7912264136 +51 42 23.582816208   21.30   19.28   ~ 3 0
23 [BBG2007] F016 G 09 17 29.8050 +51 43 00.016   20.93   18.76   ~ 2 0
24 [BBG2007] 17 GiC 09 17 29.8919 +51 43 08.720   21.27   19.32   ~ 2 0
25 [BBG2007] J091731.6+514443 GiC 09 17 31.66 +51 44 43.1   21.81   20.34   ~ 1 0
26 [BBG2007] J091732.5+514222 GiC 09 17 32.57 +51 42 22.2   22.21   20.72   ~ 1 0
27 SDSS J091732.56+514220.3 GiC 09 17 32.5760 +51 42 20.410   21.77   19.25   ~ 3 0
28 SDSS J091734.28+514113.9 GiC 09 17 34.2960 +51 41 13.956   20.64   18.50   ~ 4 0
29 SDSS J091735.13+514119.1 GiC 09 17 35.1370 +51 41 19.216   20.97   19.13   ~ 4 0
30 [BBG2007] J091735.0+514432 GiC 09 17 35.1432406536 +51 44 33.357326244   22.06   19.73   ~ 2 0
31 [BBG2007] J091735.3+513839 GiC 09 17 35.38 +51 38 39.8   20.44   18.73   ~ 1 0
32 [BBG2007] 25 GiC 09 17 35.59 +51 41 17.9   20.66   18.98   ~ 1 0
33 [BBG2007] J091736.1+514418 G 09 17 36.10 +51 44 18.2   20.75   19.44   ~ 1 0
34 [BBG2007] J091736.2+514527 GiC 09 17 36.29 +51 45 27.0   21.89   19.73   ~ 1 0
35 [BBG2007] J091737.0+514253 GiC 09 17 37.1800 +51 42 54.426   22.26   19.87   ~ 3 0
36 [BBG2007] 29 GiC 09 17 37.37 +51 42 36.4   22.85   20.73   ~ 1 0
37 SDSS J091738.09+514418.1 GiC 09 17 38.0995677648 +51 44 18.152267388   20.22   18.08   ~ 4 0
38 [BBG2007] J091738.7+514658 G 09 17 38.74 +51 46 58.4   19.67   18.84   ~ 1 0
39 SDSS J091738.76+514326.4 GiC 09 17 38.77437 +51 43 26.4452   20.60   19.30   ~ 2 0
40 SDSS J091739.39+514654.2 GiC 09 17 39.3956214192 +51 46 54.121764324   20.93   18.80   ~ 4 0
41 [BBG2007] J091739.4+514149 GiC 09 17 39.48 +51 41 49.6   21.97   20.20   ~ 1 0
42 [BBG2007] J091740.7+513818 GiC 09 17 40.73 +51 38 18.6   19.95   18.72   ~ 1 0
43 [BBG2007] 36 GiC 09 17 40.8879 +51 41 32.477   22.54   20.13   ~ 2 0
44 [BBG2007] F037 G 09 17 41.06 +51 43 58.4   22.19   20.68   ~ 1 0
45 [BBG2007] F038 G 09 17 42.79 +51 43 41.2   20.90   19.77   ~ 1 0
46 [BBG2007] J091744.0+514021 GiC 09 17 44.04 +51 40 21.0   22.51   20.52   ~ 1 0
47 SDSS J091744.80+514327.3 GiC 09 17 44.8072 +51 43 27.527   21.73   19.63   ~ 3 0
48 SDSS J091745.84+514255.7 GiC 09 17 45.8426961552 +51 42 55.741594788   21.66   19.52   ~ 3 0
49 SDSS J091746.45+514313.7 GiC 09 17 46.4528864184 +51 43 13.775976444   21.26   18.90   ~ 4 0
50 SDSS J091747.00+514530.4 GiC 09 17 47.0119378968 +51 45 30.425604336   20.74   18.64   ~ 4 0
51 [BBG2007] 44 GiC 09 17 47.14 +51 40 59.2   21.26   19.03   ~ 1 0
52 [BBG2007] J091748.0+514635 GiC 09 17 48.02 +51 46 35.4   20.30   18.65   ~ 1 0
53 SDSS J091748.38+514613.8 GiC 09 17 48.3899662584 +51 46 13.719889632   20.85   18.76   ~ 4 0
54 [BBG2007] J091748.6+514343 GiC 09 17 48.62 +51 43 43.7   22.07   20.81   ~ 1 0
55 [BBG2007] J091748.8+514059 G 09 17 48.82 +51 40 59.9   19.90   18.78   ~ 1 0
56 [BBG2007] J091748.8+514453 G 09 17 48.89 +51 44 53.5   20.05   18.73   ~ 1 0
57 [BBG2007] 50 GiC 09 17 49.5980519424 +51 43 08.956967988   21.69   19.18   ~ 2 0
58 SDSS J091749.74+514105.7 GiC 09 17 49.7470223088 +51 41 05.719141536   19.88   17.64   ~ 4 0
59 [BBG2007] J091749.8+514351 GiC 09 17 49.82 +51 43 51.0   22.67   21.27   ~ 1 0
60 [BBG2007] 53 GiC 09 17 50.6818018320 +51 43 27.037286004   20.95   18.63   ~ 2 0
61 [BBG2007] 54 GiC 09 17 51.00 +51 43 16.0   22.27   19.68   ~ 1 0
62 ACO 773 ClG 09 17 51.3 +51 43 20           ~ 295 0
63 [BBG2007] J091751.9+514133 G 09 17 51.96 +51 41 33.7   20.13   19.04   ~ 1 0
64 SDSS J091752.71+514350.8 GiC 09 17 52.7187566160 +51 43 50.829635424   20.84   18.31   ~ 3 0
65 SDSS J091753.21+514256.2 GiC 09 17 53.2202271600 +51 42 56.214054000   20.33   18.05   ~ 3 0
66 SDSS J091753.31+514409.8 GiC 09 17 53.3214209160 +51 44 09.846874608   20.81   18.59   ~ 3 0
67 2MASX J09175344+5143379 BiC 09 17 53.418 +51 43 37.35   18.1   16.49   ~ 16 1
68 2MASX J09175344+5144009 BiC 09 17 53.4760085328 +51 44 01.295985264   18.3   16.73   ~ 12 0
69 SDSS J091753.54+514424.8 GiC 09 17 53.5423502496 +51 44 24.873789732   21.40   19.05   ~ 4 0
70 [BBG2007] J091754.1+514327 GiC 09 17 54.17 +51 43 27.5   21.26   18.87   ~ 1 0
71 SDSS J091754.32+514356.2 GiC 09 17 54.3273120456 +51 43 56.219805588   19.90   17.83   ~ 4 0
72 [BBG2007] 64 GiC 09 17 54.4243392264 +51 44 53.738967084   20.44   18.58   ~ 3 0
73 [BBG2007] F065 G 09 17 54.82 +51 42 46.8   22.46   19.99   ~ 1 0
74 [BBG2007] J091754.8+514703 G 09 17 54.84 +51 47 03.8   18.84   17.77   ~ 1 0
75 [BBG2007] J091755.5+514354 GiC 09 17 55.54 +51 43 54.1   20.77   18.49   ~ 1 0
76 [BBG2007] J091755.9+514151 G 09 17 55.97 +51 41 51.0   20.85   19.24   ~ 1 0
77 SDSS J091756.92+514329.1 GiC 09 17 56.9242032360 +51 43 29.117089056   21.13   18.89   ~ 4 0
78 [BBG2007] 70 GiC 09 17 57.2920870704 +51 46 11.648820000   21.20   19.00   ~ 3 0
79 [BBG2007] 71 GiC 09 17 57.82 +51 43 27.4   23.41   21.39   ~ 1 0
80 SDSS J091758.33+514136.4 GiC 09 17 58.3416615648 +51 41 36.466244880   21.01   18.59   ~ 4 0
81 [BBG2007] 73 GiC 09 17 59.8777 +51 40 04.513   21.76   19.54   ~ 2 0
82 [BBG2007] J091800.2+514411 GiC 09 18 00.24 +51 44 11.0   20.89   19.02   ~ 1 0
83 SDSS J091800.35+514623.7 GiC 09 18 00.3489351936 +51 46 23.702982492   21.24   19.12   ~ 4 0
84 SDSS J091800.76+514408.0 GiC 09 18 00.7692327240 +51 44 08.047529808   21.30   18.86   ~ 3 0
85 [MOL2003] A0773 J091801+514415 GiC 09 18 01.4430946488 +51 44 14.424857700   21.58   19.15   ~ 3 0
86 SDSS J091801.50+514226.7 GiC 09 18 01.5094 +51 42 26.930   21.54   19.24   ~ 3 0
87 SDSS J091801.86+514034.6 GiC 09 18 01.8688113864 +51 40 34.611441960   21.27   18.85   ~ 4 0
88 [BBG2007] J091802.8+514140 GiC 09 18 02.86 +51 41 40.6   20.27   18.78   ~ 1 0
89 [BBG2007] 80 GiC 09 18 02.9615125656 +51 40 07.992886404   21.58   19.55   ~ 2 0
90 SDSS J091803.62+514351.9 GiC 09 18 03.6242257824 +51 43 51.947452200   20.20   17.98   ~ 3 0
91 SDSS J091803.72+514333.9 BiC 09 18 03.7194621048 +51 43 33.900976884   19.95   17.77   ~ 5 0
92 [BBG2007] 84 GiC 09 18 03.77 +51 43 28.2   21.29   19.24   ~ 1 0
93 SDSS J091804.16+514255.0 GiC 09 18 04.1641160688 +51 42 54.965609712   21.50   19.41   ~ 3 0
94 SDSS J091804.27+514313.7 GiC 09 18 04.2762394368 +51 43 13.689731280   21.05   18.76   ~ 4 0
95 SDSS J091804.56+514344.6 GiC 09 18 04.5676524648 +51 43 44.577345144   19.59   17.53   ~ 5 0
96 SDSS J091805.23+514350.6 GiC 09 18 05.2317107256 +51 43 50.615826960   20.04   17.98   ~ 3 0
97 SDSS J091805.51+514104.9 GiC 09 18 05.5210 +51 41 04.920   21.80   20.04   ~ 3 0
98 [BBG2007] J091805.6+513959 G 09 18 05.64 +51 39 59.0   21.46   19.38   ~ 1 0
99 [BBG2007] J091805.7+514518 GiC 09 18 05.71 +51 45 18.0   20.50   18.52   ~ 1 0
100 SDSS J091805.76+514654.0 GiC 09 18 05.7720 +51 46 54.052   20.50   18.51   ~ 3 0
101 SDSS J091805.95+514340.6 GiC 09 18 05.9560 +51 43 40.853   20.22   18.20   ~ 3 0
102 SDSS J091806.35+514200.8 GiC 09 18 06.3523115400 +51 42 00.786881844   20.90   18.91   ~ 4 0
103 SDSS J091807.25+514418.0 GiC 09 18 07.2545905320 +51 44 18.032010324   20.51   18.23   ~ 4 0
104 [BBG2007] J091807.2+514913 G 09 18 07.27 +51 49 13.8   19.56   18.44   ~ 1 0
105 [BBG2007] J091808.5+514851 G 09 18 08.57 +51 48 51.5   20.36   19.28   ~ 1 0
106 SDSS J091808.67+514810.8 GiC 09 18 08.6709962352 +51 48 10.767013848           ~ 5 0
107 SDSS J091808.74+514343.3 GiC 09 18 08.7456079800 +51 43 43.321314720   21.16   18.98   ~ 3 0
108 [BBG2007] 100 GiC 09 18 09.79 +51 41 48.1   20.36   18.70   ~ 1 0
109 [BBG2007] J091810.1+514518 GiC 09 18 10.13 +51 45 18.0   21.29   19.12   ~ 1 0
110 [BBG2007] J091810.6+514314 GiC 09 18 10.61 +51 43 14.5   21.33   19.41   ~ 1 0
111 SDSS J091810.68+514227.0 GiC 09 18 10.6889887368 +51 42 27.043475544   20.80   18.79   ~ 4 0
112 [BBG2007] J091811.4+514344 G 09 18 11.45 +51 43 44.8   20.47   19.60   ~ 1 0
113 [BBG2007] J091812.3+514748 G 09 18 12.37 +51 47 48.1   21.37   19.81   ~ 1 0
114 [BBG2007] J091812.9+514249 GiC 09 18 12.98 +51 42 49.0   21.57   19.90   ~ 1 0
115 [BBG2007] J091814.3+514643 GiC 09 18 14.38 +51 46 43.7   20.83   19.04   ~ 1 0
116 [BBG2007] J091814.5+514320 G 09 18 14.54 +51 43 20.9   20.27   18.10   ~ 1 0
117 [BBG2007] J091814.8+514349 GiC 09 18 14.81 +51 43 49.4   21.38   19.22   ~ 1 0
118 [BBG2007] F110 G 09 18 15.3610 +51 43 21.617   19.77   17.74   ~ 2 0
119 [BBG2007] J091815.8+514044 G 09 18 15.84 +51 40 44.4   20.32   18.87   ~ 1 0
120 [BBG2007] J091815.9+514533 G 09 18 15.98 +51 45 33.5   20.77   19.23   ~ 1 0
121 [BBG2007] J091817.0+514250 G 09 18 17.04 +51 42 50.0   20.07   18.04   ~ 1 0
122 [BBG2007] J091817.1+514328 G 09 18 17.11 +51 43 28.2   22.02   19.67   ~ 1 0
123 SDSS J091818.36+514753.1 GiC 09 18 18.3790 +51 47 53.090   21.75   19.39   ~ 4 0
124 [BBG2007] F116 GiC 09 18 18.6640 +51 43 49.509   20.23   17.59   ~ 3 0
125 [BBG2007] J091819.6+514248 GiC 09 18 19.66 +51 42 48.2   22.30   19.84   ~ 1 0
126 [BBG2007] J091821.0+514305 GiC 09 18 21.00 +51 43 05.5   20.67   18.38   ~ 1 0
127 [BBG2007] 119 GiC 09 18 22.1554531848 +51 47 55.508382636   21.81   19.84   ~ 2 0
128 [BBG2007] J091822.6+514309 G 09 18 22.63 +51 43 09.5   21.79   20.76   ~ 1 0
129 SDSS J091823.33+514833.7 GiC 09 18 23.3350978728 +51 48 33.716613384   20.79   18.47   ~ 3 0
130 [BBG2007] J091823.4+514522 GiC 09 18 23.42 +51 45 22.0   21.05   18.84   ~ 1 0
131 [BBG2007] J091823.4+514556 G 09 18 23.47 +51 45 56.9   21.47   19.25   ~ 1 0
132 [BBG2007] 124 GiC 09 18 23.74 +51 43 30.4   22.73   20.62   ~ 1 0
133 [BBG2007] J091823.7+514724 G 09 18 23.77 +51 47 24.9   20.20   19.38   ~ 1 0
134 [BBG2007] J091823.9+514719 GiC 09 18 23.93 +51 47 19.0   21.15   19.34   ~ 1 0
135 [BBG2007] J091824.5+514754 GiC 09 18 24.57 +51 47 54.5   21.50   20.20   ~ 1 0
136 [BBG2007] J091824.7+514201 G 09 18 24.72 +51 42 01.4   21.84   20.19   ~ 1 0
137 [BBG2007] J091825.1+514909 G 09 18 25.10 +51 49 09.1   20.78   19.43   ~ 1 0
138 [BBG2007] J091827.7+514113 G 09 18 27.72 +51 41 13.2   22.15   20.43   ~ 1 0
139 [BBG2007] J091827.7+514605 G 09 18 27.72 +51 46 05.9   20.52   19.52   ~ 1 0
140 SDSS J091827.89+514428.3 GiC 09 18 27.8944171200 +51 44 28.279977576   21.36   19.38   ~ 4 0
141 [BBG2007] 133 GiC 09 18 29.6880 +51 40 43.497   21.57   19.48   ~ 2 0
142 [BBG2007] J091830.2+514721 G 09 18 30.21 +51 47 21.9   22.38   20.21   ~ 1 0
143 [BBG2007] J091830.4+514423 G 09 18 30.46 +51 44 23.6   20.86   19.64   ~ 1 0
144 SDSS J091831.87+514250.1 GiC 09 18 31.8805023432 +51 42 50.128148448   20.60   18.51   ~ 4 0
145 [BBG2007] F137 GiC 09 18 35.4582730872 +51 45 26.884148868   19.77   17.60   ~ 3 0
146 [RGD2013] J091840.781+514413.020 G 09 18 40.7764959912 +51 44 13.004720160   20.34   18.34   ~ 2 0
147 [BBG2007] F139 G 09 18 41.33 +51 43 10.6   21.11   20.13   ~ 1 0
148 [BBG2007] J091844.4+514414 GiC 09 18 44.45 +51 44 14.3   21.78   19.71   ~ 1 0
149 [BBG2007] F141 G 09 18 44.9430526872 +51 43 10.480900188   19.92   18.21   ~ 2 0
150 [BBG2007] J091849.3+514519 G 09 18 49.37 +51 45 19.8   20.72   19.30   ~ 1 0
151 ACO 782 ClG 09 21 58 +51 58.2           ~ 7 0
152 ACO 793 ClG 09 25 36 +50 18.0           ~ 6 0
153 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 4798 2
154 NGC 4889 EmG 13 00 08.097 +27 58 37.29 12.93 13.0 11.30 11.652 10.906 ~ 704 1
155 BAX 199.3086-25.5133 ClG 13 14 25.4 -25 15 44           ~ 102 0
156 ACO 2255 ClG 17 12 50.04 +64 03 10.6           ~ 568 0

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