2010A&A...517A..65G


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST05:20:28

2010A&A...517A..65G - Astronomy and Astrophysics, volume 517, A65-65 (2010/7-1)

Internal dynamics of Abell 2294: a massive, likely merging cluster.

GIRARDI M., BOSCHIN W. and BARRENA R.

Abstract (from CDS):

The mechanisms giving rise to diffuse radio emission in galaxy clusters, and in particular their connection with cluster mergers, are still debated. We seek to explore the internal dynamics of the cluster Abell 2294, which has been shown to host a radio halo. Our analysis is mainly based on redshift data for 88 galaxies acquired at the Telescopio Nazionale Galileo. We combine galaxy velocities and positions to select 78 cluster galaxies and analyze its internal dynamics. We also use both photometric data acquired at the Isaac Newton Telescope and X-ray data from the Chandra archive.We re-estimate the redshift of the large, brightest cluster galaxy (BCG) obtaining <z≥0.1690, which closely agrees with the mean cluster redshift. We estimate a quite large line-of-sight (LOS) velocity dispersion σV∼1400km/s and X-ray temperature TX∼10keV. Our optical and X-ray analyses detect substructure. Our results imply that the cluster is composed of two massive subclusters separated by a LOS rest frame velocity difference Vrf∼2000km/s, very closely projected in the plane of sky along the SE-NW direction. This observational picture, interpreted in terms of the analytical two-body model, suggests that Abell 2294 is a cluster merger elongated mainly in the LOS direction and captured during the bound outgoing phase, a few fractions of Gyr after the core crossing. We find that Abell 2294 is a very massive cluster with a range of M=2-4x1015 h70–1 M, depending on the adopted model. In contrast to previous findings, we find no evidence of Hα emission in the spectrum of the BCG galaxy.The emerging picture of Abell 2294 is that of a massive, quite ``normal'' merging cluster, like many clusters hosting diffuse radio sources. However, perhaps because of its particular geometry, more data are needed for reach a definitive, more quantitative conclusion.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: individual: Abell 2294 - galaxies: clusters: general - galaxies: kinematics and dynamics

VizieR on-line data: <Available at CDS (J/A+A/517/A65): table1.dat>

Nomenclature: Table 1: [GBB2010b] NN (Nos 1-88).

Simbad objects: 100

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Number of rows : 100

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 ZwCl 0024+1652 ClG 00 26 36.0 +17 08 36     18.35     ~ 603 1
2 ACO 115 ClG 00 55 59.5 +26 19 14           ~ 235 1
3 ACO 291 ClG 02 01 38.4 -02 10 33           ~ 52 0
4 ACO 520 ClG 04 54 19.0 +02 56 49           ~ 381 0
5 ACO 3391 ClG 06 26 15.4 -53 40 52           ~ 170 1
6 ACO 3395 ClG 06 27 31.1 -54 23 58           ~ 179 0
7 ACO 697 ClG 08 42 57.6 +36 21 45           ~ 214 0
8 ACO 1240 ClG 11 23 32 +43 06.5           ~ 72 0
9 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4208 2
10 [GBB2010b] 1 G 17 21 01.7617348742 +85 51 20.889099836   18.65   17.21   ~ 1 0
11 [GBB2010b] 2 BiC 17 21 09.36 +85 53 32.7   19.79   17.82   ~ 1 0
12 [GBB2010b] 3 BiC 17 21 14.69 +85 57 31.3   19.04   16.92   ~ 1 0
13 [GBB2010b] 4 BiC 17 21 23.83 +85 54 29.0   20.24   18.17   ~ 1 0
14 [GBB2010b] 5 BiC 17 21 33.77 +85 56 33.5   20.29   19.42   ~ 1 0
15 [GBB2010b] 6 BiC 17 21 35.57 +85 53 21.4   20.89   18.88   ~ 1 0
16 [GBB2010b] 7 BiC 17 21 52.0111465135 +85 53 52.924526670   19.92   18.05   ~ 1 0
17 [GBB2010b] 8 BiC 17 22 05.21 +85 56 42.0   20.75   19.10   ~ 1 0
18 [GBB2010b] 9 BiC 17 22 13.44 +85 56 40.9   19.86   17.83   ~ 1 0
19 [GBB2010b] 10 G 17 22 20.83 +85 50 54.7   19.42   18.19   ~ 1 0
20 [GBB2010b] 11 BiC 17 22 22.49 +85 52 05.8   18.51   17.21   ~ 1 0
21 [GBB2010b] 12 BiC 17 22 23.50 +85 54 14.6   20.77   18.81   ~ 1 0
22 [GBB2010b] 13 BiC 17 22 29.06 +85 52 33.8   18.49   17.68   ~ 1 0
23 [GBB2010b] 14 BiC 17 22 32.31 +85 55 59.5   20.97   18.83   ~ 1 0
24 [GBB2010b] 15 G 17 22 35.95 +85 48 54.6   18.56   17.22   ~ 1 0
25 [GBB2010b] 16 BiC 17 22 37.99 +85 55 19.7   19.55   17.54   ~ 1 0
26 [RMO2003] ACO 2294 6 BiC 17 22 47.69 +85 56 20.1   18.87   16.64   ~ 2 0
27 [GBB2010b] 18 BiC 17 22 51.26 +85 52 59.6   18.99   16.89   ~ 1 0
28 [GBB2010b] 19 BiC 17 22 56.69 +85 50 41.1   20.57   18.79   ~ 1 0
29 [GBB2010b] 20 BiC 17 23 08.14 +85 56 01.1   21.08   19.14   ~ 1 0
30 [GBB2010b] 21 BiC 17 23 10.5967718683 +85 52 05.300161597   19.02   17.04   ~ 1 0
31 [GBB2010b] 22 BiC 17 23 15.98 +85 52 16.1   20.84   18.94   ~ 1 0
32 [GBB2010b] 23 BiC 17 23 23.83 +85 52 35.9   19.98   17.89   ~ 1 0
33 [GBB2010b] 24 BiC 17 23 26.93 +85 52 56.8   19.06   18.06   ~ 1 0
34 [GBB2010b] 25 BiC 17 23 28.63 +85 52 00.2   19.92   17.97   ~ 1 0
35 [GBB2010b] 26 BiC 17 23 35.18 +85 53 13.3   20.05   17.97   ~ 1 0
36 [GBB2010b] 27 BiC 17 23 40.4393861466 +85 51 54.336376539   19.16   17.36   ~ 1 0
37 [GBB2010b] 28 BiC 17 23 41.37 +85 52 53.2   18.76   16.64   ~ 1 0
38 [GBB2010b] 29 BiC 17 23 41.5143128386 +85 53 49.972081061   19.54   17.60   ~ 1 0
39 [GBB2010b] 30 BiC 17 23 41.73 +85 54 43.2   19.97   17.91   ~ 1 0
40 [GBB2010b] 31 G 17 23 42.82 +85 55 01.1   20.22   18.09   ~ 1 0
41 [GBB2010b] 32 BiC 17 23 45.34 +85 53 55.6   19.33   17.39   ~ 1 0
42 [GBB2010b] 33 BiC 17 23 49.32 +85 50 37.0   20.67   18.87   ~ 1 0
43 [GBB2010b] 34 BiC 17 23 49.37 +85 50 39.7   20.12   18.50   ~ 1 0
44 [GBB2010b] 35 BiC 17 23 49.78 +85 49 38.1   20.67   18.70   ~ 1 0
45 [GBB2010b] 36 BiC 17 23 52.4859346603 +85 51 00.773436764   20.48   18.41   ~ 1 0
46 [GBB2010b] 37 BiC 17 23 54.4520380952 +85 49 53.135625530   20.17   18.34   ~ 1 0
47 [GBB2010b] 38 BiC 17 23 55.53 +85 53 17.8   19.82   17.92   ~ 1 0
48 [GBB2010b] 39 BiC 17 23 55.92 +85 52 55.7   18.67   16.76   ~ 1 0
49 [RMO2003] ACO 2294 1 rG 17 23 59.630 +85 58 22.77           ~ 2 0
50 [GBB2010b] 40 BiC 17 24 00.51 +85 53 43.4   20.52   18.44   ~ 1 0
51 [GBB2010b] 41 G 17 24 00.91 +85 54 37.6   19.09   17.10   ~ 1 0
52 [GBB2010b] 42 BiC 17 24 01.54 +85 51 34.3   18.16   17.18   ~ 1 0
53 [GBB2010b] 43 BiC 17 24 03.53 +85 51 34.7   19.26   17.80   ~ 1 0
54 [GBB2010b] 44 BiC 17 24 06.91 +85 51 44.7   20.41   18.19   ~ 1 0
55 ACO 2294 ClG 17 24 10.1 +85 53 09           ~ 56 0
56 [GBB2010b] 45 BiC 17 24 11.76 +85 50 03.4   20.91   19.00   ~ 1 0
57 2MASX J17241223+8553116 BiC 17 24 12.231 +85 53 11.64   17.12   15.01   ~ 4 0
58 [RMO2003] ACO 2294 2 BiC 17 24 12.94 +85 53 32.4   20.02   18.05   ~ 2 0
59 [GBB2010b] 48 BiC 17 24 13.62 +85 53 14.7   20.03   17.86   ~ 1 0
60 [GBB2010b] 49 BiC 17 24 14.94 +85 53 35.1   20.34   18.58   ~ 1 0
61 [GBB2010b] 50 BiC 17 24 22.95 +85 52 00.0   20.06   18.12   ~ 1 0
62 [GBB2010b] 51 BiC 17 24 28.34 +85 53 25.9   19.69   17.61   ~ 1 0
63 [GBB2010b] 52 BiC 17 24 33.43 +85 53 25.5   21.04   18.95   ~ 1 0
64 [GBB2010b] 53 BiC 17 24 36.29 +85 52 57.0   20.72   18.58   ~ 1 0
65 [GBB2010b] 54 BiC 17 24 44.81 +85 54 44.7   19.57   17.57   ~ 1 0
66 [GBB2010b] 55 BiC 17 24 48.05 +85 53 05.9   20.52   18.68   ~ 1 0
67 [GBB2010b] 56 BiC 17 24 54.5798741525 +85 53 52.987228627   20.52   18.45   ~ 1 0
68 [GBB2010b] 57 BiC 17 24 55.99 +85 52 11.3   19.92   17.84   ~ 1 0
69 [GBB2010b] 58 BiC 17 24 59.4718261739 +85 52 44.074729907   20.67   18.67   ~ 1 0
70 [GBB2010b] 59 BiC 17 25 03.41 +85 50 25.1   20.52   18.42   ~ 1 0
71 [GBB2010b] 60 G 17 25 09.21 +85 50 16.9   21.11   20.61   ~ 1 0
72 [GBB2010b] 61 BiC 17 25 09.98 +85 54 10.7   21.77   19.77   ~ 1 0
73 [GBB2010b] 62 BiC 17 25 10.31 +85 50 15.0   20.77   18.77   ~ 1 0
74 [GBB2010b] 63 BiC 17 25 15.91 +85 53 33.0   19.87   19.02   ~ 1 0
75 [GBB2010b] 64 BiC 17 25 19.18 +85 53 26.5   20.20   18.21   ~ 1 0
76 [GBB2010b] 65 BiC 17 25 19.99 +85 55 54.0   20.51   18.71   ~ 1 0
77 [GBB2010b] 66 G 17 25 22.27 +85 52 52.7   20.31   18.92   ~ 1 0
78 [GBB2010b] 67 BiC 17 25 31.13 +85 53 44.8   20.58   18.69   ~ 1 0
79 [GBB2010b] 68 BiC 17 25 34.97 +85 55 48.5   20.78   18.84   ~ 1 0
80 [GBB2010b] 69 BiC 17 25 42.63 +85 51 27.3   20.08   18.04   ~ 1 0
81 [GBB2010b] 70 G 17 25 45.98 +85 55 53.9   19.95   18.29   ~ 1 0
82 [GBB2010b] 71 G 17 25 46.11 +85 53 44.3   21.58   19.96   ~ 1 0
83 [GBB2010b] 72 BiC 17 25 50.09 +85 51 43.2   20.54   18.58   ~ 1 0
84 [GBB2010b] 73 BiC 17 25 53.45 +85 56 55.0   19.77   18.66   ~ 1 0
85 [GBB2010b] 74 G 17 25 57.79 +85 56 29.1   19.54   18.27   ~ 1 0
86 [GBB2010b] 75 BiC 17 26 10.2135388558 +85 54 35.787216078   19.31   17.25   ~ 1 0
87 [GBB2010b] 76 BiC 17 26 14.1542587846 +85 52 19.095268008   20.50   18.59   ~ 1 0
88 [GBB2010b] 77 BiC 17 26 26.37 +85 54 27.9   19.78   17.83   ~ 1 0
89 [GBB2010b] 78 G 17 26 34.30 +85 52 58.7   20.37   18.76   ~ 1 0
90 [GBB2010b] 79 BiC 17 26 36.99 +85 52 23.7   18.83   17.04   ~ 1 0
91 [GBB2010b] 80 BiC 17 26 41.11 +85 53 38.2   19.93   18.02   ~ 1 0
92 [GBB2010b] 81 G 17 26 44.04 +85 56 58.2   21.52   19.85   ~ 1 0
93 [GBB2010b] 82 BiC 17 26 45.34 +85 51 21.5   19.95   18.93   ~ 1 0
94 [GBB2010b] 83 BiC 17 26 50.47 +85 51 47.5   20.52   18.71   ~ 1 0
95 [GBB2010b] 84 BiC 17 26 58.03 +85 54 19.1   20.69   18.93   ~ 1 0
96 [GBB2010b] 85 BiC 17 27 08.4769496842 +85 52 14.518106932   20.66   18.60   ~ 1 0
97 [GBB2010b] 86 BiC 17 27 08.50 +85 54 29.4   19.54   17.99   ~ 1 0
98 [GBB2010b] 87 BiC 17 27 22.08 +85 53 56.5   20.38   18.82   ~ 1 0
99 [GBB2010b] 88 G 17 27 35.04 +85 54 08.7   21.18   18.98   ~ 1 0
100 [RMO2003] ACO 2294 3 rG 17 28 01.620 +85 57 02.93           ~ 2 0

    Equat.    Gal    SGal    Ecl

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2020.07.04-05:20:28

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