2001A&A...377..428S

Query : 2001A&A...377..428S

2001A&A...377..428S - Astronomy and Astrophysics, volume 377428-441 (2001/10-2)

The cluster of galaxies Abell 970.

SODRE L.Jr, PROUST D., CAPELATO H.V., LIMA NETO G.B., CUEVAS H., QUINTANA H. and FOUQUE P.

Abstract (from CDS):

We present a dynamical analysis of the galaxy cluster Abell 970 based on a new set of radial velocities measured at ESO, Pic du Midi and Haute-Provence observatories. Our analysis indicates that this cluster has a substructure and is out of dynamical equilibrium. This conclusion is also supported by differences in the positions of the peaks of the surface density distribution and X-ray emission, as well as by the evidence of a large-scale velocity gradient in the cluster. We also found a discrepancy between the masses inferred with the virial theorem and those inferred with the X-ray emission, which is expected if the galaxies and the gas inside the cluster are not in hydrostatic equilibrium. Abell 970 has a modest cooling flow, as is expected if it is out of equilibrium. We propose that cooling flows may have an intermittent behaviour, with phases of massive cooling flows being followed by phases without significant cooling flows after the accretion of a galaxy group massive enough to disrupt the dynamical equilibrium in the centre of the clusters. A massive cooling flow will be established again, after a new equilibrium is achieved.

Abstract Copyright: ∼

Journal keyword(s): galaxies: clusters: general - clusters: individual: A970 - distances and redshifts - large-scale structure of Universe - X-ray: general

VizieR on-line data: <Available at CDS (J/A+A/377/428): table1.dat>

Nomenclature: Table 1: [SPC2001] NN (Nos 1-69).

Simbad objects: 74

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Number of rows : 74
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 2MASX J10163683-1032366 GiC 10 16 36.8542946496 -10 32 36.528286740   17.22   15.82   ~ 6 0
2 [SPC2001] 68 GiC 10 16 37.3 -10 32 39           ~ 1 0
3 2MASX J10164123-1052356 SyG 10 16 41.239 -10 52 35.68   17.09   15.74   ~ 8 0
4 [SPC2001] 66 GiC 10 16 48.8312657328 -10 39 08.385342840           ~ 3 0
5 2MASX J10164982-1047212 GiC 10 16 49.8464514768 -10 47 21.097861656   16.88   15.61   ~ 7 0
6 2MASX J10165187-1036132 GiC 10 16 51.8653456752 -10 36 13.368028644           ~ 6 0
7 [SPC2001] 52 GiC 10 16 53.1632633424 -10 43 41.363338152           ~ 5 0
8 WINGS J101654.05-104308.4 GiC 10 16 54.0508339392 -10 43 08.276147436           ~ 4 0
9 2MASX J10165465-1033202 GiC 10 16 54.6314527320 -10 33 20.298848004           ~ 4 0
10 2MASX J10165526-1030472 GiC 10 16 55.265 -10 30 47.22           ~ 3 0
11 2MASX J10165580-1038492 GiC 10 16 55.7647866504 -10 38 49.511020812           ~ 5 0
12 2MASX J10165742-1040142 GiC 10 16 57.4016588592 -10 40 13.954504152   17.27   15.97   ~ 6 0
13 2MASX J10165844-1038052 GiC 10 16 58.447 -10 38 05.23   16.37   14.99   ~ 7 0
14 2MASX J10165967-1037382 GiC 10 16 59.6461591344 -10 37 38.043440184           ~ 5 0
15 LEDA 973745 EmG 10 17 00.4902878592 -10 47 15.879202692           ~ 5 0
16 [SPC2001] 42 GiC 10 17 00.6 -10 37 12           ~ 1 0
17 [SPC2001] 46 EmG 10 17 01.951 -10 39 57.96           ~ 3 0
18 LEDA 975854 GiC 10 17 03.8600862360 -10 37 36.983304156           ~ 5 0
19 LEDA 3093341 EmG 10 17 07.5752827920 -10 45 45.269240364   16.62   15.70   ~ 6 0
20 2MASX J10171018-1046242 GiC 10 17 10.1609377440 -10 46 24.562772148           ~ 3 0
21 LEDA 976198 EmG 10 17 11.741 -10 36 05.22   16.22   15.21   ~ 5 0
22 2MASX J10171255-1040032 GiC 10 17 12.5801511240 -10 40 03.674115012           ~ 5 0
23 2MASX J10171289-1042452 GiC 10 17 12.9343639800 -10 42 45.380054736           ~ 6 0
24 WINGS J101714.38-103914.9 GiC 10 17 14.389 -10 39 15.11           ~ 3 0
25 LEDA 974578 EmG 10 17 15.552 -10 43 26.85           ~ 5 0
26 WINGS J101720.67-104414.8 GiC 10 17 20.6673343224 -10 44 14.743986288           ~ 5 0
27 2MASX J10172100-1040116 GiC 10 17 20.9873728704 -10 40 11.352671472   16.95   15.63   ~ 6 0
28 2MASX J10172161-1042546 GiC 10 17 21.6165393360 -10 42 55.000006668           ~ 5 0
29 [SPC2001] 28 GiC 10 17 21.8398307232 -10 43 11.097206076           ~ 3 0
30 [SPC2001] 24 GiC 10 17 21.9794963280 -10 39 44.231761908           ~ 3 0
31 2MASX J10172243-1039476 GiC 10 17 22.4694398232 -10 39 47.955691116   16.93   15.03   ~ 5 0
32 2MASX J10172317-1040166 GiC 10 17 23.1843933600 -10 40 16.704356124           ~ 4 0
33 WINGS J101723.82-104214.6 GiC 10 17 23.8020329352 -10 42 14.473574064           ~ 3 0
34 2MASX J10172432-1043266 GiC 10 17 24.2994745128 -10 43 27.185536668           ~ 6 0
35 2MASX J10172460-1041196 GiC 10 17 24.5713574928 -10 41 20.031291924           ~ 1 0
36 [SPC2001] 26 GiC 10 17 25.1472822624 -10 41 04.833263832           ~ 3 0
37 2MASX J10172568-1041206 BiC 10 17 25.6982425920 -10 41 20.293861056   15.58   15.11   ~ 12 0
38 [SPC2001] 5 GiC 10 17 26.2689233040 -10 41 31.551195588           ~ 3 0
39 2MASX J10172724-1041496 LIN 10 17 27.2715787608 -10 41 49.741304532           ~ 5 0
40 2MASX J10172758-1039106 GiC 10 17 27.5520691992 -10 39 10.706808348           ~ 4 0
41 2MASX J10172798-1044156 GiC 10 17 27.9705311832 -10 44 16.201459968           ~ 4 0
42 2MASX J10172799-1039256 GiC 10 17 28.0024898712 -10 39 25.217629416           ~ 4 0
43 WINGS J101728.27-104057.1 GiC 10 17 28.2581045112 -10 40 57.273388968           ~ 3 0
44 [SPC2001] 27 GiC 10 17 28.5 -10 41 13           ~ 1 0
45 2MASX J10172941-1042156 GiC 10 17 29.4050720592 -10 42 15.404791248           ~ 3 0
46 2MASX J10172941-1044336 SyG 10 17 29.4110474496 -10 44 33.442526832           ~ 4 0
47 2MASX J10172968-1040306 GiC 10 17 29.7008026992 -10 40 30.404509248   17.34   15.96   ~ 6 0
48 2MASX J10173002-1043076 GiC 10 17 30.0128398104 -10 43 07.643347356           ~ 3 0
49 2MASX J10173070-1036226 EmG 10 17 30.6930267768 -10 36 22.417701948           ~ 4 0
50 2MASX J10173179-1042576 GiC 10 17 31.7684121768 -10 42 57.488320728           ~ 3 0
51 WINGS J101732.32-103425.0 GiC 10 17 32.335 -10 34 24.56           ~ 3 0
52 [SPC2001] 13 GiC 10 17 32.9513098416 -10 43 51.054019788           ~ 4 0
53 2MASX J10173362-1038446 EmG 10 17 33.622 -10 38 44.64           ~ 4 0
54 ACO 970 ClG 10 17 34.3 -10 42 01           ~ 93 0
55 6dFGS gJ101735.5-103954 GiC 10 17 35.5295907984 -10 39 54.209493612   16.82   15.42   ~ 8 0
56 LEDA 974003 GiC 10 17 36.8 -10 46 03           ~ 4 3
57 6dFGS gJ101736.9-104601 Sy2 10 17 36.881 -10 46 01.64   15.86   14.72   ~ 6 1
58 2MASX J10174156-1035446 GiC 10 17 41.5486109808 -10 35 44.427198552           ~ 4 0
59 [SPC2001] 67 EmG 10 17 42.013 -10 45 47.85           ~ 4 0
60 2MASX J10174461-1039126 GiC 10 17 44.6181578376 -10 39 13.025308860           ~ 5 0
61 WINGS J101746.97-104517.3 GiC 10 17 46.9619751192 -10 45 17.455119732           ~ 4 0
62 6dFGS gJ101751.1-103459 GiC 10 17 51.1013674728 -10 34 58.937656368   16.99   16.12   ~ 3 0
63 [SPC2001] 56 SyG 10 17 51.631 -10 44 44.96           ~ 3 0
64 WINGS J101754.54-104345.6 GiC 10 17 54.549 -10 43 45.49           ~ 4 0
65 2MASX J10175765-1033456 GiC 10 17 57.6573456168 -10 33 45.914483304           ~ 5 0
66 [SPC2001] 59 GiC 10 18 04.0 -10 41 44           ~ 1 0
67 [SPC2001] 58 GiC 10 18 06.9078524952 -10 42 40.855602492           ~ 4 0
68 WINGS J101813.01-103440.9 GiC 10 18 13.0104 -10 34 41.196           ~ 2 0
69 2MASX J10181556-1045006 GiC 10 18 15.5458599528 -10 45 01.200822120           ~ 6 0
70 2MASX J10181804-1046454 GiC 10 18 18.0170314392 -10 46 45.864749388   15.75   14.50   ~ 17 0
71 ACO 979 ClG 10 20 19.8 -07 53 37           ~ 46 1
72 ACO 978 ClG 10 20 26.66 -06 31 37.5           ~ 126 1
73 ACO 993 ClG 10 21 55.77 -04 53 26.6           ~ 72 1
74 NAME SEX SUPERCL SCG 10 24 -08.4           ~ 18 0

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