2013MNRAS.430.3453B

Query : 2013MNRAS.430.3453B

2013MNRAS.430.3453B - Mon. Not. R. Astron. Soc., 430, 3453-3464 (2013/April-3)

The puzzling merging cluster Abell 1914: new insights from the kinematics of member galaxies.

BARRENA R., GIRARDI M. and BOSCHIN W.

Abstract (from CDS):

We analyse the dynamical state of Abell 1914, a merging cluster hosting a radio halo, quite unusual for its structure. Our study considers spectroscopic data for 119 galaxies obtained with the Italian Telescopio Nazionale Galileo. We select 89 cluster members from spatial and velocity distributions. We also use photometry Canada-France-Hawaii Telescope archives. We compute the mean cluster redshift, <z> = 0.168, and the velocity dispersion which shows a high value, σV = 1210^+ 125_- 110 km s-1. From the 2D analysis we find that Abell 1914 has a north-east (NE)-south-west (SW) elongated structure with two galaxy clumps, that mostly merge in the plane of the sky. Our best but very uncertain estimate of the velocity dispersion of the main system is σV, main ∼ 1000 km s-1. We estimate a virial mass Msys = 1.4-2.6x 1015h^- 1_70M☉ for the whole system. We study the merger through a simple two-body model and find that data are consistent with a bound, outgoing substructure observed just after the core crossing. By studying the 2D distribution of the red galaxies, photometrically selected, we show that Abell 1914 is contained in a rich large-scale structure, with two close companion galaxy systems, known to be at z ∼ 0.17. The system at SW supports the idea that the cluster is accreting groups from a filament aligned in the NE-SW direction, while that at NW suggests a second direction of the accretion (NW-SE). We conclude that Abell 1914 well fits among typical clusters with radio haloes. We argue that the unusual radio emission is connected to the complex cluster accretion and suggest that Abell 1914 resembles the well-known nearby merging cluster Abell 754 for its particular observed phenomenology.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): galaxies: clusters: general - galaxies: clusters: individual: Abell 1914

VizieR on-line data: <Available at CDS (J/MNRAS/430/3453): table1.dat>

Nomenclature: Table 1: [BGB2013] NNN (Nos 1-119).

CDS comments: 400d J1425+3758 is [BVH2007] 5-10 in Simbad.

Simbad objects: 132

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Number of rows : 132
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 ZwCl 0024+1652 ClG 00 26 35.6 +17 09 32     18.35     ~ 648 1
2 ACO 3266 ClG 04 31 26.4 -61 25 17           ~ 447 0
3 ACO 520 ClG 04 54 10.1 +02 55 38           ~ 465 0
4 ACO 523 ClG 04 59 01 +08 46.5           ~ 66 0
5 ClG 0657-56 ClG 06 58 26.9 -55 58 21           ~ 1077 1
6 ACO 754 ClG 09 09 14.8 -09 40 35           ~ 695 1
7 NSCS J142452+373753 ClG 14 24 51.88 +37 37 52.2           ~ 1 0
8 2MAXI J1423+379 ClG 14 25 04.5 +37 58 16           ~ 9 0
9 [BGB2013] 116 G 14 25 29.4638014584 +37 47 00.127148892           ~ 3 0
10 [BGB2013] 84 G 14 25 30.96 +37 48 56.2           ~ 1 0
11 [BGB2013] 79 G 14 25 30.98 +37 47 42.2           ~ 1 0
12 [BGB2013] 76 G 14 25 32.1013836168 +37 49 42.083300352           ~ 2 0
13 [BGB2013] 81 G 14 25 33.41 +37 46 12.7           ~ 1 0
14 [BGB2013] 78 G 14 25 33.46 +37 47 57.8           ~ 1 0
15 [BGB2013] 80 G 14 25 34.12 +37 46 19.4           ~ 1 0
16 [BGB2013] 57 G 14 25 35.1914567568 +37 46 57.483038532           ~ 1 0
17 [BGB2013] 77 G 14 25 35.57 +37 47 55.9           ~ 1 0
18 [BGB2013] 89 GiC 14 25 36.4893835368 +37 47 37.570391736           ~ 3 0
19 [BGB2013] 58 GiC 14 25 37.3494313320 +37 45 27.950338908           ~ 3 0
20 [BGB2013] 55 GiC 14 25 37.6822106760 +37 47 16.463311512           ~ 3 0
21 [BGB2013] 56 GiC 14 25 38.1469354104 +37 46 47.511066792           ~ 3 0
22 [BGB2013] 48 G 14 25 39.4540097568 +37 49 43.149819144           ~ 5 0
23 [BGB2013] 82 GiC 14 25 40.3550725200 +37 50 40.826254200           ~ 3 0
24 [BGB2013] 50 GiC 14 25 41.2189318488 +37 48 33.090334920           ~ 3 0
25 [BGB2013] 53 GiC 14 25 41.30 +37 47 21.5           ~ 2 0
26 [BGB2013] 87 G 14 25 41.35 +37 48 53.7           ~ 1 0
27 [BGB2013] 83 G 14 25 41.46 +37 50 37.9           ~ 1 0
28 [BGB2013] 85 GiC 14 25 42.0910421256 +37 49 49.594262160           ~ 2 0
29 [BGB2013] 99 G 14 25 42.34 +37 45 37.4           ~ 1 0
30 [BGB2013] 49 GiC 14 25 42.8071536528 +37 48 24.836701392           ~ 3 0
31 [BGB2013] 54 G 14 25 43.18 +37 46 28.8           ~ 1 0
32 [BGB2013] 52 GiC 14 25 43.6228123608 +37 47 09.384304164           ~ 3 0
33 [BGB2013] 86 GiC 14 25 44.5169162448 +37 49 59.940849396           ~ 3 0
34 [BGB2013] 75 GiC 14 25 45.3867259872 +37 46 38.193206952           ~ 3 0
35 [BGB2013] 45 GiC 14 25 45.9180293904 +37 48 59.020211088           ~ 3 0
36 [BGB2013] 72 GiC 14 25 46.8036847848 +37 48 33.110523900           ~ 3 0
37 [BGB2013] 74 G 14 25 47.16 +37 47 32.7           ~ 1 0
38 [BGB2013] 73 rG 14 25 47.7928384228 +37 47 47.975421099           ~ 4 0
39 [BGB2013] 95 G 14 25 47.86 +37 47 40.3           ~ 1 0
40 [BGB2013] 44 GiC 14 25 47.8802070360 +37 48 42.651594432           ~ 3 0
41 [BGB2013] 94 G 14 25 47.8995386160 +37 47 59.897176296           ~ 3 0
42 [BGB2013] 96 G 14 25 48.93 +37 47 40.5           ~ 1 0
43 [BGB2013] 103 G 14 25 49.27 +37 45 04.7           ~ 1 0
44 [BGB2013] 91 G 14 25 49.31 +37 48 58.9           ~ 1 0
45 [BGB2013] 70 GiC 14 25 49.5095602200 +37 48 36.038260872           ~ 2 0
46 [BGB2013] 106 GiC 14 25 49.5527737224 +37 44 32.168573628           ~ 3 0
47 [BGB2013] 47 GiC 14 25 49.6110764568 +37 47 12.889267728           ~ 3 0
48 [BGB2013] 118 GiC 14 25 49.8165111336 +37 53 04.012202364           ~ 6 0
49 [BGB2013] 51 GiC 14 25 50.1266675640 +37 45 40.150524852           ~ 3 0
50 [BGB2013] 88 G 14 25 50.54 +37 49 58.0           ~ 1 0
51 [BGB2013] 112 G 14 25 50.55 +37 43 08.8           ~ 1 0
52 [BGB2013] 109 G 14 25 51.38 +37 43 58.6           ~ 1 0
53 [BGB2013] 110 G 14 25 51.90 +37 43 49.7           ~ 1 0
54 [BGB2013] 34 GiC 14 25 51.9924654432 +37 48 32.259276432           ~ 3 0
55 [BGB2013] 104 G 14 25 52.09 +37 45 16.2           ~ 1 0
56 [BGB2013] 69 GiC 14 25 52.1869963920 +37 48 13.382190288           ~ 3 0
57 [BGB2013] 65 G 14 25 52.49 +37 50 35.7           ~ 2 0
58 [BGB2013] 102 GiC 14 25 52.7342627856 +37 45 45.921464424           ~ 3 0
59 [BGB2013] 46 GiC 14 25 53.1561784968 +37 46 25.428404568           ~ 3 0
60 [BGB2013] 71 GiC 14 25 53.42 +37 47 11.2           ~ 2 0
61 [BGB2013] 97 G 14 25 53.51 +37 48 05.9           ~ 1 0
62 DES J142553.87+374729.5 rG 14 25 53.8834060416 +37 47 29.476367700           ~ 5 0
63 [BGB2013] 101 G 14 25 54.29 +37 46 51.5           ~ 1 0
64 [BGB2013] 32 GiC 14 25 54.5526339504 +37 48 32.983268760           ~ 3 0
65 [BGB2013] 38 GiC 14 25 54.6350324808 +37 50 42.413419572           ~ 3 0
66 [BGB2013] 43 GiC 14 25 54.86 +37 47 27.5           ~ 2 0
67 [BGB2013] 64 GiC 14 25 55.0316449824 +37 51 00.691321140           ~ 4 0
68 [BGB2013] 68 GiC 14 25 55.10 +37 48 18.9           ~ 2 0
69 [BGB2013] 31 G 14 25 55.1289854166 +37 48 38.330203460           ~ 2 0
70 [BGB2013] 67 G 14 25 55.51 +37 48 24.9           ~ 1 0
71 [BGB2013] 33 G 14 25 56.50 +37 47 40.9           ~ 1 0
72 [BGB2013] 92 G 14 25 56.55 +37 49 45.4           ~ 2 0
73 LEDA 3560721 BiC 14 25 56.6687229816 +37 48 59.163785964           ~ 18 1
74 [BGB2013] 41 GiC 14 25 56.7164114318 +37 48 35.196080505           ~ 3 0
75 [BGB2013] 100 G 14 25 56.75 +37 47 27.0           ~ 1 0
76 [BGB2013] 98 GiC 14 25 56.78 +37 47 54.6           ~ 2 0
77 [BGB2013] 40 G 14 25 57.04 +37 49 24.0           ~ 1 0
78 [BGB2013] 30 G 14 25 57.3749071080 +37 48 19.338389892           ~ 1 0
79 ACO 1914 ClG 14 25 57.4 +37 49 54           ~ 338 0
80 [BGB2013] 111 G 14 25 57.45 +37 44 19.9           ~ 1 0
81 [BGB2013] 39 rG 14 25 57.9364175424 +37 49 29.376827652           ~ 4 0
82 [BGB2013] 90 G 14 25 57.98 +37 50 23.9           ~ 1 0
83 [BGB2013] 28 G 14 25 58.0390324824 +37 49 01.927835904           ~ 1 0
84 [BGB2013] 27 G 14 25 58.1869315824 +37 49 18.409749744           ~ 2 0
85 [BGB2013] 24 GiC 14 25 58.1885808934 +37 50 20.157956457           ~ 3 0
86 [BGB2013] 66 G 14 25 58.3220773656 +37 48 40.240244376           ~ 1 0
87 GMBCG 216.49530+37.62102 ClG 14 25 58.87 +37 37 15.7           ~ 1 0
88 [BGB2013] 42 G 14 25 58.9344213864 +37 46 44.834390328           ~ 3 0
89 [BGB2013] 60 G 14 25 59.08 +37 51 38.0           ~ 1 0
90 [BGB2013] 114 G 14 25 59.476 +37 50 54.19           ~ 3 0
91 DES J142559.56+374939.9 rG 14 25 59.5715909280 +37 49 39.894264084   19.5       ~ 4 0
92 [BGB2013] 113 GiC 14 25 59.8852049976 +37 44 11.884057476           ~ 3 0
93 [BGB2013] 26 rG 14 26 00.1684622232 +37 49 10.214043924           ~ 3 0
94 [ZEH2003] RX J1426.0+3749 2 GiC 14 26 00.3892167288 +37 50 04.397688204   18.5       ~ 4 0
95 [BGB2013] 25 GiC 14 26 00.4617355464 +37 49 19.687541304           ~ 2 0
96 [BGB2013] 59 G 14 26 00.7863655080 +37 51 26.531620632           ~ 1 0
97 [BGB2013] 107 G 14 26 01.01 +37 45 49.6           ~ 1 0
98 [BGB2013] 63 GiC 14 26 01.7936188224 +37 49 27.862631868           ~ 3 0
99 [BGB2013] 62 G 14 26 01.96 +37 49 49.2           ~ 1 0
100 SDSS J142602.57+374951.3 BiC 14 26 02.578 +37 49 51.06   18.8       ~ 8 0
101 [BGB2013] 21 GiC 14 26 02.7596432928 +37 49 53.883107544           ~ 2 0
102 [BGB2013] 23 GiC 14 26 03.0841003224 +37 49 24.627513684           ~ 3 0
103 [BGB2013] 61 GiC 14 26 03.3303672864 +37 49 58.615663764           ~ 4 0
104 2MASX J14260392+3749530 BiC 14 26 03.926 +37 49 53.07   17.9       ~ 5 0
105 [BGB2013] 19 GiC 14 26 04.3814898840 +37 49 56.995520268           ~ 2 0
106 [BGB2013] 17 rG 14 26 04.4848574856 +37 50 29.353520148           ~ 5 0
107 [BGB2013] 10 GiC 14 26 05.16 +37 52 54.9           ~ 3 0
108 [BGB2013] 15 G 14 26 05.55 +37 50 59.4           ~ 1 0
109 [BGB2013] 18 GiC 14 26 06.2532370981 +37 49 45.932305734           ~ 3 0
110 [BGB2013] 115 G 14 26 06.579 +37 51 28.28           ~ 5 0
111 [BGB2013] 108 GiC 14 26 07.5254323176 +37 46 31.850857560           ~ 3 0
112 [BGB2013] 16 GiC 14 26 07.62 +37 50 03.1           ~ 2 0
113 [BGB2013] 36 G 14 26 07.9821767640 +37 49 10.252125264           ~ 2 0
114 [BGB2013] 11 GiC 14 26 08.7099366624 +37 51 38.968163640           ~ 3 0
115 [BGB2013] 105 GiC 14 26 09.3813371736 +37 47 29.133353508           ~ 3 0
116 [BGB2013] 14 G 14 26 09.48 +37 50 16.6           ~ 2 0
117 [BGB2013] 13 rG 14 26 11.1045619416 +37 50 22.106994720           ~ 4 0
118 [BGB2013] 12 G 14 26 11.55 +37 50 23.3           ~ 1 0
119 [BGB2013] 1 GiC 14 26 11.6559805152 +37 55 16.527765648           ~ 3 0
120 [BGB2013] 9 G 14 26 15.09 +37 50 39.9           ~ 1 0
121 [BGB2013] 8 G 14 26 16.1317273848 +37 50 36.254910084           ~ 2 0
122 [BGB2013] 4 G 14 26 16.9018378776 +37 52 29.051401152           ~ 2 0
123 [BGB2013] 5 GiC 14 26 18.9133185744 +37 51 12.578102640           ~ 4 0
124 [BGB2013] 117 GiC 14 26 19.2547432824 +37 48 43.432808184           ~ 6 0
125 [BGB2013] 3 G 14 26 19.27 +37 52 05.7           ~ 2 0
126 [BGB2013] 2 G 14 26 19.43 +37 52 24.7           ~ 1 0
127 [BGB2013] 7 G 14 26 19.8291886176 +37 49 56.705199816           ~ 1 0
128 SDSSCGB 11624.1 GiC 14 26 22.9732998936 +37 54 01.863862200           ~ 6 0
129 [BGB2013] 6 G 14 26 24.30 +37 49 21.9           ~ 1 0
130 NSCS J142638+375327 ClG 14 26 38.26 +37 53 26.2           ~ 1 0
131 ACO 2345 ClG 21 27 05.391 -12 09 07.41           ~ 151 0
132 NVSS J212709-120958 Rad 21 27 09.27 -12 10 01.5           ~ 132 1

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