2006A&A...449..461B


C.D.S. - SIMBAD4 rel 1.7 - 2020.12.03CET19:50:38

2006A&A...449..461B - Astronomy and Astrophysics, volume 449, 461-474 (2006/4-2)

Internal dynamics of the radio halo cluster Abell 2744.

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

Abstract (from CDS):

We present a detailed dynamical analysis of the rich galaxy cluster A2744, containing a powerful diffuse radio halo.Our analysis is based on redshift data for 102 galaxies, part of them recovered from unexplored spectra in the ESO archive. We combine galaxy velocity and position information to select the cluster members and determine global dynamical properties of the cluster. We use a variety of statistical tests to detect possible substructures. We find that A2744 appears as a well isolated peak in the redshift space at <z≥0.306, which includes 85 galaxies recognized as cluster members. We compute the line-of-sight (LOS) velocity dispersion of galaxies, σV=1767–99+121km/s, which is significantly larger than what is expected in the case of a relaxed cluster with an observed X-ray temperature of 8 keV. We find evidence that this cluster is far from dynamical equilibrium, as shown by the non-Gaussian nature of the velocity distribution, the presence of a velocity gradient and a significant substructure. Our analysis shows the presence of two galaxy clumps of different mean LOS velocities ΔV∼4000km/s. We detect a main, low-velocity clump with σV∼1200-1300km/s and a secondary, high-velocity clump with σV=500-800km/s and located in the S-SW cluster region. We estimate a cluster mass within 1Mpc of 1.4-2.4x1015M, depending on the model adopted to describe the cluster dynamics. Our results suggest a merging scenario of two clumps with a mass ratio of 3:1 and a LOS impact velocity of ΔVrf∼3000km/s, likely observed just after the core passage. The merging is occuring roughly in the NS direction with the axis close to the LOS. This scenario agrees with that proposed on the basis of recent Chandra results in its general lines although suggesting a somewhat more advanced merging phase. Our conclusions support the view of the connection between extended radio emission and energetic merging phenomena in galaxy clusters.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: general - galaxies: clusters: individual: Abell 2744 - galaxies: distances and redshifts - intergalactic medium - cosmology: observations

VizieR on-line data: <Available at CDS (J/A+A/449/461): table1.dat>

Nomenclature: Table 1: [BGS2006] NNN (Nos 1-102).

Simbad objects: 104

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Number of rows : 104

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 [BGS2006] 1 GiC 00 14 09.15 -30 23 09.4   20.62 19.62 18.81   ~ 7 0
2 [BML2002] 278 GiC 00 14 09.45 -30 24 40.4   21.55 20.54 19.52   ~ 7 0
3 [BML2002] 1028 GiC 00 14 12.243 -30 21 49.24     22.029     ~ 5 0
4 [BGS2006] 4 GiC 00 14 12.970 -30 22 34.80     19.578     ~ 7 1
5 [BGS2006] 5 GiC 00 14 13.000 -30 22 55.30     20.178     ~ 6 0
6 [BGS2006] 6 G 00 14 13.320 -30 19 59.70     20.542     ~ 4 0
7 [BGS2006] 7 GiC 00 14 13.370 -30 22 16.70     21.587     ~ 6 0
8 [BGS2006] 8 GiC 00 14 13.700 -30 24 38.80     20.866     ~ 6 0
9 [BGS2006] 9 GiC 00 14 13.820 -30 25 15.20   21.31 20.50 19.77   ~ 7 0
10 [BGS2006] 10 GiC 00 14 14.110 -30 24 37.80     21.568     ~ 6 0
11 [BGS2006] 11 G 00 14 14.200 -30 20 57.00     21.167     ~ 4 0
12 [BGS2006] 12 SyG 00 14 14.370 -30 22 39.90   18.95 20.012     ~ 10 0
13 [BGS2006] 13 G 00 14 14.400 -30 20 08.60     20.075     ~ 4 0
14 [BGS2006] 14 GiC 00 14 14.510 -30 22 30.20     21.424     ~ 6 0
15 [BGS2006] 15 GiC 00 14 14.650 -30 21 48.80     19.667     ~ 8 0
16 [BGS2006] 17 GiC 00 14 14.960 -30 24 08.40     21.280     ~ 7 0
17 [ORN2011] 003.562417-30.371666 G 00 14 14.980 -30 22 18.00     19.729     ~ 6 0
18 [BGS2006] 18 G 00 14 15.210 -30 21 08.20     20.271     ~ 4 0
19 [BGS2006] 19 G 00 14 15.630 -30 21 43.30     20.487     ~ 4 0
20 [ORN2011] 003.565500-30.382889 GiC 00 14 15.6834 -30 22 58.616   23.1938 21.1740   20.2696 ~ 9 0
21 [ORN2011] 003.565458-30.386972 GiC 00 14 15.729 -30 23 13.53   22.4856 20.6852   19.9010 ~ 8 0
22 [BGS2006] 21 G 00 14 15.730 -30 20 29.21     21.092     ~ 4 0
23 [MAC2016] A2744cl 1811 GiC 00 14 15.924 -30 23 17.74   22.0472 20.1321   19.2705 ~ 10 0
24 [BGS2006] 24 G 00 14 16.340 -30 21 30.40     21.367     ~ 4 0
25 [BGS2006] 25 G 00 14 16.760 -30 20 39.10     21.606     ~ 4 0
26 [BGS2006] 26 GiC 00 14 16.800 -30 21 45.50     21.328     ~ 4 0
27 [MAT2017] Abell2744CLS 2179 GiC 00 14 16.842 -30 23 11.22   22.2790 20.2246   19.3474 ~ 10 0
28 [BML2002] 768 GiC 00 14 16.900 -30 22 08.20     19.763     ~ 7 0
29 [BGS2006] 29 G 00 14 17.600 -30 20 20.70     21.099     ~ 5 0
30 [BGS2006] 30 GiC 00 14 17.610 -30 25 22.50     20.848     ~ 5 0
31 [BGS2006] 32 GiC 00 14 17.745 -30 23 00.76     20.406     ~ 6 0
32 [ORN2011] 003.573833-30.408694 GiC 00 14 17.7456 -30 24 31.799   22.1053 20.4015   19.5118 ~ 10 0
33 [BGS2006] 34 GiC 00 14 17.970 -30 25 42.00     20.208     ~ 5 0
34 [ORN2011] 003.574750-30.398306 GiC 00 14 17.9778 -30 23 54.161   22.2383 20.2615   19.2947 ~ 11 0
35 [MAT2017] Abell2744CLS 1227 GiC 00 14 18.030 -30 22 37.60   22.2814 20.2335   19.3460 ~ 10 0
36 [BGS2006] 36 GiC 00 14 18.140 -30 21 49.50     20.504     ~ 6 0
37 [BGS2006] 37 GiC 00 14 18.190 -30 26 14.70     20.316     ~ 5 0
38 [BGS2006] 38 G 00 14 18.270 -30 21 32.60     20.912     ~ 4 0
39 [ORN2011] 003.576769-30.368824 G 00 14 18.425 -30 22 07.77     21.269     ~ 5 0
40 [TSB2015] GLASS A2744-00065 G 00 14 18.480 -30 22 46.12   23.4982 21.8760   20.9710 ~ 10 0
41 [BGS2006] 41 G 00 14 18.530 -30 21 09.40     20.406     ~ 4 0
42 [BGS2006] 42 GiC 00 14 18.810 -30 26 53.00     21.124     ~ 5 0
43 [BML2002] 822 G 00 14 18.810 -30 21 25.40     19.552     ~ 6 0
44 [ADR2016] Abell 2744 1331 GiC 00 14 18.8421 -30 24 12.155   21.8333 19.7760   19.1239 ~ 11 0
45 [MAT2017] Abell2744CLS 4648 GiC 00 14 19.090 -30 24 32.70   21.3024 19.5348   18.6763 ~ 11 0
46 [MAT2017] Abell2744CLS 2786 GiC 00 14 19.420 -30 23 26.70   21.2564 20.3296   19.8491 ~ 12 0
47 [ORN2011] 003.582000-30.398611 GiC 00 14 19.7175 -30 23 54.871     21.169     ~ 8 0
48 [BGS2006] 48 GiC 00 14 19.910 -30 26 00.30     20.268     ~ 5 0
49 ACO 2744 ClG 00 14 20.03 -30 23 17.8           ~ 585 0
50 [BGS2006] 49 GiC 00 14 20.240 -30 21 16.10     20.493     ~ 6 0
51 [MAT2017] Abell2744CLS 3109 GiC 00 14 20.497 -30 23 39.46   22.6512 19.2524   18.0713 ~ 12 0
52 [BGS2006] 51 GiC 00 14 20.50 -30 22 00.5     21.115     ~ 6 0
53 [BGS2006] 52 G 00 14 20.620 -30 26 07.40     19.706     ~ 5 0
54 [BGS2006] 54 GiC 00 14 20.670 -30 26 51.80     20.894     ~ 6 0
55 [BGS2006] 55 GiC 00 14 20.700 -30 26 45.00     21.190     ~ 5 0
56 2dFGRS TGS361Z173 BiC 00 14 20.704 -30 24 00.66   21.2572 18.1736 17.460 17.1432 ~ 16 1
57 [BGS2006] 56 GiC 00 14 20.760 -30 22 02.70     20.433     ~ 5 0
58 [MAC2016] A2744cl 683 GiC 00 14 20.8902 -30 24 17.821   23.5822 21.7358   20.8734 ~ 9 0
59 [BML2002] 452 GiC 00 14 21.015 -30 23 35.98     21.670     ~ 5 0
60 [MAT2017] Abell2744CLS 3160 GiC 00 14 21.040 -30 23 47.00     20.257     ~ 7 0
61 [ORN2011] 003.588042-30.315443 G 00 14 21.130 -30 18 55.59   20.86 20.09 19.37   ~ 4 0
62 [ORN2011] 003.587894-30.395049 GiC 00 14 21.160 -30 23 42.34   23.3221 20.1583   19.2160 ~ 10 0
63 [MAC2016] A2744cl 100009 GiC 00 14 21.280 -30 23 45.90   23.2495 20.4720   19.6333 ~ 9 0
64 [BGS2006] 63 GiC 00 14 21.390 -30 25 10.70     20.895     ~ 6 0
65 [ORN2011] 003.589083-30.387278 GiC 00 14 21.4041 -30 23 14.618   22.5812 20.6110   19.6575 ~ 10 0
66 [ORN2011] 003.589292-30.389694 GiC 00 14 21.412 -30 23 23.42   22.3382 20.4205   19.4802 ~ 9 0
67 [BGS2006] 65 GiC 00 14 21.4337147134 -30 22 08.571461050     19.251     ~ 7 0
68 [MAT2017] Abell2744CLS 1984 GiC 00 14 21.670 -30 22 57.80   23.5683 21.6776   20.7601 ~ 9 0
69 [BGS2006] 68 GiC 00 14 21.712 -30 24 01.47     21.100     ~ 7 0
70 [ORN2011] 003.591583-30.407667 GiC 00 14 22.0136 -30 24 28.107   23.3485 21.3297   20.5842 ~ 9 0
71 [ORN2011] 003.592042-30.405417 BiC 00 14 22.091 -30 24 20.69   21.0939 18.0175 17.93 17.1015 ~ 16 1
72 [ADR2016] Abell 2744 2502 GiC 00 14 22.3200 -30 23 57.597   22.1047 20.2214   19.3679 ~ 10 0
73 [MAT2017] Abell2744CLS 2587 GiC 00 14 22.755 -30 23 29.99   21.7906 18.9061 18.50 17.8948 ~ 12 0
74 [ORN2011] 003.595667-30.406222 GiC 00 14 23.0181 -30 24 22.384   22.8683 21.2030   20.3356 ~ 9 0
75 [ORN2011] 003.596042-30.352751 G 00 14 23.050 -30 21 09.90     20.418     ~ 3 0
76 [BGS2006] 75 GiC 00 14 23.080 -30 26 10.20     20.610     ~ 6 0
77 [BGS2006] 76 G 00 14 23.100 -30 20 53.60     20.217     ~ 4 0
78 LEDA 138140 GiC 00 14 23.5 -30 24 33     20.343     ~ 6 0
79 [MAC2016] A2744cl 1117 GiC 00 14 23.7541 -30 23 51.072   22.4915 20.5317   19.6527 ~ 10 0
80 LEDA 138141 GiC 00 14 23.937 -30 23 22.69     20.200     ~ 7 0
81 [BGS2006] 80 GiC 00 14 24.170 -30 25 36.00     20.752     ~ 4 0
82 [BGS2006] 81 GiC 00 14 24.222 -30 25 03.89   23.1513 21.2444   20.3639 ~ 7 0
83 CN AC118 130 GiC 00 14 24.3 -30 24 57           ~ 2 0
84 [BGS2006] 82 GiC 00 14 24.30 -30 25 48.6     20.283     ~ 3 0
85 [BGS2006] 83 GiC 00 14 24.304 -30 24 55.39   23.0224 21.0850   20.2378 ~ 9 0
86 [BAE96] AC 118 149 GiC 00 14 24.470 -30 22 39.20     20.709     ~ 6 0
87 [MAT2017] Abell2744CLS 5181 GiC 00 14 25.000 -30 24 52.00   22.9691 20.9911   20.0915 ~ 10 0
88 [BGS2006] 86 G 00 14 25.520 -30 20 19.90     20.744     ~ 4 0
89 [BGS2006] 87 GiC 00 14 25.580 -30 22 00.50     21.126     ~ 5 0
90 [BGS2006] 88 GiC 00 14 25.660 -30 24 12.60   21.4528 20.0771   19.7185 ~ 11 0
91 [MAT2017] Abell2744CLS 1711 GiC 00 14 26.293 -30 22 55.60   21.2383 19.6196   18.8102 ~ 8 0
92 2dFGRS TGS360Z233 GiC 00 14 26.5581033214 -30 23 44.115935612   19.267 19.258 18.369   ~ 10 0
93 [ORN2011] 003.610750-30.442139 G 00 14 26.580 -30 26 31.70     20.187     ~ 3 0
94 [BGS2006] 92 G 00 14 26.650 -30 19 14.70     20.922     ~ 4 0
95 [BGS2006] 93 GiC 00 14 26.960 -30 24 33.20     20.161     ~ 6 0
96 [BGS2006] 94 GiC 00 14 27.080 -30 25 31.90     21.477     ~ 5 0
97 [BGS2006] 95 GiC 00 14 27.210 -30 22 13.70     20.708     ~ 5 0
98 [ORN2011] 003.614750-30.445276 G 00 14 27.540 -30 26 42.99     20.643     ~ 3 0
99 [BGS2006] 97 GiC 00 14 29.390 -30 25 08.30     20.041     ~ 6 0
100 [BGS2006] 98 GiC 00 14 29.720 -30 26 24.10     20.785     ~ 5 0
101 [BGS2006] 99 GiC 00 14 29.780 -30 22 10.00     20.374     ~ 6 0
102 [BGS2006] 100 GiC 00 14 30.050 -30 24 32.90     20.227     ~ 6 0
103 [BGS2006] 101 G 00 14 30.250 -30 20 58.90   21.18 20.10 19.07   ~ 5 0
104 [BGS2006] 102 GiC 00 14 30.590 -30 21 19.70     20.590     ~ 5 0

    Equat.    Gal    SGal    Ecl

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2020.12.03-19:50:39

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