2000ApJ...540..726G

Query : 2000ApJ...540..726G

2000ApJ...540..726G - Astrophys. J., 540, 726-740 (2000/September-2)

A merger scenario for the dynamics of Abell 665.

GOMEZ P.L., HUGHES J.P. and BIRKINSHAW M.

Abstract (from CDS):

We present new redshift measurements for 55 galaxies in the vicinity of the rich galaxy cluster Abell 665. When combined with results from the literature, we have good velocity measurements for a sample of 77 confirmed cluster members from which we derive the cluster's redshift z=0.1829±0.0005 and line-of-sight velocity dispersion σ=1390+120–110 km.s–1. Our analysis of the kinematical and spatial data for the subset of galaxies located within the central 750 kpc reveals only subtle evidence for substructure and non-Gaussianity in the velocity distribution. We find that the brightest cluster member is not moving significantly relative to the other galaxies near the center of the cluster. On the other hand, our deep ROSAT high-resolution image of A665 shows strong evidence for isophotal twisting and centroid variation, thereby confirming previous suggestions of significant substructure in the hot X-ray-emitting intracluster gas. In light of this evident substructure, we have compared the optical velocity data with N-body simulations of head-on cluster mergers. We find that a merger of two similar mass subclusters (mass ratios of 1:1 or 1:2) seen close to the time of core-crossing produces velocity distributions that are consistent with that observed.

Abstract Copyright: ∼

Journal keyword(s): galaxies: clusters: individual (A665) - Galaxies: Intergalactic Medium - X-Rays: Galaxies

Nomenclature: Table 2: [GHB2000] NNN (Nos 1-147).

Simbad objects: 149

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Number of rows : 149
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 OFHH 231 GiC 08 30 34.34 +65 51 51.1           ~ 3 0
2 OFHH 235 GiC 08 30 35.73 +65 52 37.3           ~ 2 0
3 [GHB2000] 56 GiC 08 30 35.8 +65 52 32           ~ 1 0
4 [GHB2000] 58 GiC 08 30 36.1 +65 49 51           ~ 1 0
5 [GHB2000] 57 GiC 08 30 36.1 +65 54 08           ~ 1 0
6 [GHB2000] 3 GiC 08 30 37.1 +65 49 28           ~ 1 0
7 2MASS J08303720+6552234 GiC 08 30 37.1460428808 +65 52 24.137320440           ~ 1 0
8 SDSS J083037.57+655330.3 GiC 08 30 37.57183 +65 53 30.3384           ~ 2 0
9 [GHB2000] 4 GiC 08 30 37.7 +65 50 59           ~ 1 0
10 [GHB2000] 5 GiC 08 30 38.1 +65 51 40           ~ 1 0
11 [GHB2000] 6 GiC 08 30 38.8 +65 52 51           ~ 1 0
12 [GHB2000] 8 GiC 08 30 39.1 +65 49 17           ~ 1 0
13 [GHB2000] 7 GiC 08 30 39.1 +65 49 49           ~ 1 0
14 [GHB2000] 61 ? 08 30 39.4 +65 50 35           ~ 1 0
15 [GHB2000] 9 GiC 08 30 40.2 +65 50 25           ~ 1 0
16 [GHB2000] 10 GiC 08 30 40.3 +65 48 27           ~ 1 0
17 [GHB2000] 11 GiC 08 30 41.5 +65 50 46           ~ 1 0
18 [GHB2000] 62 GiC 08 30 41.7 +65 52 18           ~ 1 0
19 OFHH 225 GiC 08 30 42.09 +65 50 35.7           ~ 2 0
20 [GHB2000] 63 ? 08 30 42.1 +65 49 08           ~ 1 0
21 [GHB2000] 64 GiC 08 30 43.0 +65 49 46           ~ 1 0
22 [GHB2000] 65 ? 08 30 43.1 +65 50 18           ~ 1 0
23 OFHH 227 GiC 08 30 43.40 +65 50 43.7           ~ 2 0
24 [GHB2000] 67 ? 08 30 43.9 +65 48 01           ~ 1 0
25 [GHB2000] 13 G 08 30 43.9 +65 51 29           ~ 1 0
26 [GHB2000] 68 ? 08 30 44.0 +65 50 34           ~ 1 0
27 [GHB2000] 69 GiC 08 30 44.3 +65 50 41           ~ 1 0
28 [GHB2000] 70 GiC 08 30 44.6 +65 52 13           ~ 1 0
29 [GHB2000] 71 ? 08 30 44.9 +65 51 55           ~ 1 0
30 ACO 665 ClG 08 30 45.2 +65 52 55           ~ 457 0
31 [GHB2000] 72 GiC 08 30 45.4 +65 48 25           ~ 1 0
32 [GHB2000] 73 GiC 08 30 45.4 +65 50 43           ~ 1 0
33 [GHB2000] 14 G 08 30 46.3 +65 51 12           ~ 1 0
34 [GHB2000] 74 ? 08 30 46.4 +65 52 55           ~ 1 0
35 [GHB2000] 75 GiC 08 30 46.7 +65 49 48           ~ 1 0
36 [GHB2000] 76 GiC 08 30 47.4 +65 51 00           ~ 1 0
37 [GHB2000] 77 GiC 08 30 47.7 +65 49 27           ~ 1 0
38 [GHB2000] 15 GiC 08 30 48.2 +65 52 33           ~ 1 0
39 [GHB2000] 16 GiC 08 30 49.0 +65 50 00           ~ 1 0
40 [GHB2000] 79 * 08 30 49.2 +65 50 51           ~ 1 0
41 [GHB2000] 80 ? 08 30 49.5 +65 47 57           ~ 1 0
42 [GHB2000] 17 GiC 08 30 49.7 +65 48 52           ~ 1 0
43 [GHB2000] 18 GiC 08 30 50.4 +65 51 07           ~ 1 0
44 [GHB2000] 81 ? 08 30 50.7 +65 48 35           ~ 1 0
45 [GHB2000] 82 GiC 08 30 50.9 +65 51 23           ~ 1 0
46 [GHB2000] 83 GiC 08 30 51.0 +65 49 28           ~ 1 0
47 [GHB2000] 84 GiC 08 30 51.3 +65 51 12           ~ 1 0
48 [GHB2000] 85 ? 08 30 51.3 +65 51 30           ~ 1 0
49 [GHB2000] 19 GiC 08 30 51.4 +65 48 39           ~ 1 0
50 2MASS J08305186+6552268 NIR 08 30 51.8156554128 +65 52 26.603456196           ~ 1 0
51 [GHB2000] 87 GiC 08 30 52.2 +65 49 20           ~ 1 0
52 [GHB2000] 88 ? 08 30 52.4 +65 51 03           ~ 1 0
53 [GHB2000] 89 GiC 08 30 52.5 +65 48 59           ~ 1 0
54 [GHB2000] 20 G 08 30 52.7 +65 49 26           ~ 1 0
55 [GHB2000] 90 ? 08 30 52.7 +65 52 31           ~ 1 0
56 [GHB2000] 21 GiC 08 30 52.8 +65 48 49           ~ 1 0
57 [GHB2000] 22 GiC 08 30 53.6 +65 50 43           ~ 1 0
58 [GHB2000] 23 GiC 08 30 53.9 +65 51 23           ~ 1 0
59 [GHB2000] 24 GiC 08 30 54.5 +65 51 24           ~ 1 0
60 [GHB2000] 92 ? 08 30 54.7 +65 49 24           ~ 1 0
61 [GHB2000] 91 GiC 08 30 54.7 +65 50 23           ~ 1 0
62 [GHB2000] 25 GiC 08 30 54.9 +65 52 17           ~ 1 0
63 [GHB2000] 93 GiC 08 30 55.0 +65 52 08           ~ 1 0
64 [GHB2000] 26 GiC 08 30 55.4 +65 50 06           ~ 1 0
65 [GHB2000] 27 GiC 08 30 55.5 +65 50 41           ~ 1 0
66 [GHB2000] 28 GiC 08 30 55.6 -65 51 37           ~ 1 0
67 [GHB2000] 29 GiC 08 30 55.8 +65 49 01           ~ 1 0
68 [GHB2000] 94 GiC 08 30 55.8 +65 50 49           ~ 1 0
69 [JFH99] ACO 665 1084 GiC 08 30 55.96 +65 49 47.4           ~ 3 0
70 [JFH99] ACO 665 1035 GiC 08 30 55.99 +65 49 12.4           ~ 3 0
71 [GHB2000] 30 GiC 08 30 56.0 +65 51 02           ~ 1 0
72 [GHB2000] 95 GiC 08 30 56.0 +65 52 05           ~ 1 0
73 [GHB2000] 33 GiC 08 30 56.7 +65 50 58           ~ 1 0
74 [GHB2000] 96 ? 08 30 57.0 +65 49 49           ~ 1 0
75 2MASX J08305736+6550299 BiC 08 30 57.365 +65 50 29.98   19.3       ~ 14 0
76 [GHB2000] 97 GiC 08 30 57.8 +65 50 17           ~ 1 0
77 [GHB2000] 98 GiC 08 30 58.2 +65 52 27           ~ 1 0
78 [GHB2000] 99 GiC 08 30 58.4 +65 50 17           ~ 1 0
79 [GHB2000] 35 GiC 08 30 58.5 +65 51 16           ~ 1 0
80 [GHB2000] 101 GiC 08 30 58.7 +65 48 02           ~ 1 0
81 [GHB2000] 36 GiC 08 30 58.7 +65 48 48           ~ 1 0
82 [GHB2000] 100 GiC 08 30 58.7 +65 50 07           ~ 1 0
83 [GHB2000] 102 GiC 08 30 58.9 +65 50 43           ~ 1 0
84 [GHB2000] 37 GiC 08 30 59.0 +65 50 23           ~ 1 0
85 [GHB2000] 103 GiC 08 30 59.2 +65 50 52           ~ 1 0
86 [GHB2000] 104 GiC 08 30 59.5 +65 50 21           ~ 1 0
87 [GHB2000] 105 ? 08 30 59.6 +65 50 57           ~ 1 0
88 [GHB2000] 106 GiC 08 30 59.7 +65 49 35           ~ 1 0
89 [GHB2000] 38 GiC 08 30 59.7 +65 52 13           ~ 1 0
90 [GHB2000] 107 ? 08 30 59.9 +65 50 48           ~ 1 0
91 [GHB2000] 108 * 08 31 00.0697713552 +65 51 48.896595684   16.1       ~ 2 0
92 [GHB2000] 109 ? 08 31 00.6 +65 48 59           ~ 1 0
93 [GHB2000] 39 GiC 08 31 00.6 +65 50 22           ~ 1 0
94 [GHB2000] 110 GiC 08 31 00.6 +65 51 38           ~ 1 0
95 [GHB2000] 111 ? 08 31 00.8 +65 48 41           ~ 1 0
96 [GHB2000] 40 GiC 08 31 01.1 +65 50 43           ~ 1 0
97 [GHB2000] 112 GiC 08 31 01.5 +65 48 09           ~ 1 0
98 [GHB2000] 41 GiC 08 31 02.3 +65 49 37           ~ 1 0
99 [GHB2000] 113 GiC 08 31 03.1 +65 50 02           ~ 1 0
100 [GHB2000] 114 GiC 08 31 03.2 +65 49 56           ~ 1 0
101 2MASX J08310323+6550489 GiC 08 31 03.2131549752 +65 50 48.493018536   19.3       ~ 5 0
102 [GHB2000] 115 GiC 08 31 03.4 +65 48 52           ~ 1 0
103 [GHB2000] 116 GiC 08 31 04.1 +65 50 09           ~ 1 0
104 [GHB2000] 117 ? 08 31 05.2 +65 47 53           ~ 1 0
105 [GHB2000] 43 GiC 08 31 05.4 +65 51 04           ~ 1 0
106 [GHB2000] 44 G 08 31 05.6 +65 48 47           ~ 1 0
107 [GHB2000] 120 ? 08 31 05.6 +65 50 44           ~ 1 0
108 [GHB2000] 119 ? 08 31 05.6 +65 51 09           ~ 1 0
109 [GHB2000] 118 GiC 08 31 05.6 +65 51 56           ~ 1 0
110 [GHB2000] 121 GiC 08 31 06.4 +65 48 15           ~ 1 0
111 [GHB2000] 122 GiC 08 31 06.6 +65 49 38           ~ 1 0
112 [GHB2000] 123 GiC 08 31 06.9 +65 50 18           ~ 1 0
113 [GHB2000] 124 ? 08 31 07.2 +65 49 19           ~ 1 0
114 [GHB2000] 125 GiC 08 31 07.3 +65 51 35           ~ 1 0
115 [GHB2000] 45 GiC 08 31 07.9 +65 49 24           ~ 1 0
116 [GHB2000] 127 ? 08 31 07.9 +65 50 06           ~ 1 0
117 [GHB2000] 126 GiC 08 31 07.9 +65 50 43           ~ 1 0
118 [GHB2000] 128 ? 08 31 08.0 +65 49 36           ~ 1 0
119 [GHB2000] 129 ? 08 31 08.3 +65 51 43           ~ 1 0
120 [GHB2000] 130 GiC 08 31 09.9 +65 48 41           ~ 1 0
121 [GHB2000] 131 GiC 08 31 10.1 +65 48 12           ~ 1 0
122 OFHH 218 GiC 08 31 10.32 +65 49 16.8           ~ 2 0
123 [GHB2000] 132 GiC 08 31 10.4 +65 47 48           ~ 1 0
124 [GHB2000] 133 ? 08 31 11.0 +65 51 41           ~ 1 0
125 [GHB2000] 47 GiC 08 31 11.1 +65 51 47           ~ 1 0
126 [GHB2000] 134 GiC 08 31 11.2 +65 49 52           ~ 1 0
127 [GHB2000] 48 GiC 08 31 11.6 +65 49 28           ~ 1 0
128 LEDA 100237 GiC 08 31 12.08 +65 52 43.1           ~ 3 0
129 [GHB2000] 50 GiC 08 31 13.2 +65 49 35           ~ 1 0
130 [GHB2000] 135 ? 08 31 13.8 +65 49 37           ~ 1 0
131 [GHB2000] 51 GiC 08 31 14.2 +65 50 45           ~ 1 0
132 [GHB2000] 137 GiC 08 31 16.2 +65 49 04           ~ 1 0
133 [GHB2000] 136 GiC 08 31 16.2 +65 49 42           ~ 1 0
134 [GHB2000] 52 GiC 08 31 16.3 +65 51 36           ~ 1 0
135 [GHB2000] 138 GiC 08 31 16.4 +65 50 27           ~ 1 0
136 [GHB2000] 140 GiC 08 31 18.6 +65 48 38           ~ 1 0
137 [GHB2000] 139 GiC 08 31 18.6 +65 52 10           ~ 1 0
138 [GHB2000] 53 GiC 08 31 19.0 +65 51 07           ~ 1 0
139 [GHB2000] 141 GiC 08 31 19.1 +65 50 02           ~ 1 0
140 [GHB2000] 142 ? 08 31 19.3 +65 52 51           ~ 1 0
141 [GHB2000] 143 ? 08 31 19.5 +65 49 28           ~ 1 0
142 [GHB2000] 144 GiC 08 31 20.8 +65 49 48           ~ 1 0
143 [GHB2000] 54 GiC 08 31 22.5 +65 49 13           ~ 1 0
144 [GHB2000] 145 GiC 08 31 22.6 +65 51 32           ~ 1 0
145 [GHB2000] 55 GiC 08 31 23.3 +65 52 33           ~ 1 0
146 [GHB2000] 146 GiC 08 31 23.4 +65 48 19           ~ 1 0
147 [GHB2000] 147 GiC 08 31 23.7 +65 52 21           ~ 1 0
148 [GHB2000] 78 GiC 08 39 48.3 +65 49 58           ~ 1 0
149 NGC 4486B GiG 12 30 31.985 +12 29 24.85   14.5       ~ 428 0

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