2015A&A...583A.124D

Query : 2015A&A...583A.124D

2015A&A...583A.124D - Astronomy and Astrophysics, volume 583A, 124-124 (2015/11-1)

Ophiuchus: An optical view of a very massive cluster of galaxies hidden behind the Milky Way.

DURRET F., WAKAMATSU K., NAGAYAMA T., ADAMI C. and BIVIANO A.

Abstract (from CDS):

The Ophiuchus cluster, at a redshift z=0.0296, is known from X-rays to be one of the most massive nearby clusters, but its optical properties have not been investigated in detail because of its very low Galactic latitude. We discuss the optical properties of the galaxies in the Ophiuchus cluster, in particular, with the aim of understanding its dynamical properties better. We have obtained deep optical imaging in several bands with various telescopes, and applied a sophisticated method to model and subtract the contributions of stars to measure galaxy magnitudes as accurately as possible. The colour-magnitude relations obtained show that there are hardly any blue galaxies in Ophiuchus (at least brighter than r'≤19.5), and this is confirmed by the fact that we only detect two galaxies in Hα. We also obtained a number of spectra with ESO-FORS2, which we combined with previously available redshifts. Altogether, we have 152 galaxies with spectroscopic redshifts in the 0.02≤z≤0.04 range, and 89 galaxies with both a redshift within the cluster redshift range and a measured r' band magnitude (limited to the Megacam 1x1deg2 field). A complete dynamical analysis based on the galaxy redshifts available shows that the overall cluster is relaxed and has a mass of 1.1x1015M☉. The Sernal-Gerbal method detects a main structure and a much smaller substructure, which are not separated in projection. From its dynamical properties derived from optical data, the Ophiuchus cluster seems overall to be a relaxed structure, or at most a minor merger, though in X-rays the central region (radius ∼150kpc) may show evidence for merging effects.

Abstract Copyright: ∼

Journal keyword(s): galaxies: clusters: individual: Ophiuchus - galaxies: photometry

VizieR on-line data: <Available at CDS (J/A+A/583/A124): tablea1.dat tablea2.dat tablea3.dat>

Nomenclature: Tables A.1-A.2: [DWN2015] OPH JHHMMSS.ss+DDMMSS N=162+65.

Simbad objects: 165

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Number of rows : 165
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 ACO 85 ClG 00 41 36.21 -09 19 30.4           ~ 910 0
2 ACO 496 ClG 04 33 38.8 -13 15 59           ~ 694 2
3 NAME Great Attractor SCG 10 32 -46.0           ~ 558 0
4 NGC 4696 BiC 12 48 49.2724775784 -41 18 39.304053252   11.21   10.7   ~ 491 3
5 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 4809 2
6 1RXS J132441.9-573650 ClG 13 24 43.2 -57 36 52           ~ 24 1
7 ACO 3627 ClG 16 14 22.5 -60 52 07           ~ 297 2
8 ESO 519-2 G 17 07 17.6853087432 -24 06 38.896942248   15.61   17.35   ~ 9 0
9 2MASX J17073583-2353321 GiG 17 07 35.838 -23 53 32.12           ~ 9 0
10 2MASX J17075426-2346173 GiG 17 07 54.2377325136 -23 46 17.442355800           ~ 9 0
11 2MASX J17075972-2346163 G 17 07 59.7193165872 -23 46 16.042634292   18.04   16.02   ~ 2 0
12 6dFGS gJ170809.6-223207 EmG 17 08 09.5950228224 -22 32 07.601950680   18.68   16.71   ~ 5 0
13 6dFGS gJ170818.9-225259 G 17 08 18.8694823680 -22 52 58.415321640   19.74   17.26   ~ 5 0
14 X Oph X-2 X 17 08 23 -22 48.2           ~ 28 1
15 2MASX J17082726-2326327 G 17 08 27.268 -23 26 32.78   17.81   16.41   ~ 3 0
16 2MASX J17082979-2256397 G 17 08 29.795 -22 56 39.78           ~ 3 0
17 2MASX J17083142-2217447 G 17 08 31.4430512544 -22 17 44.891819484   18.09   16.28   ~ 6 0
18 2MASX J17084712-2329350 G 17 08 47.12 -23 29 35.0           ~ 1 0
19 2MASX J17085724-2346260 GiG 17 08 57.2647850376 -23 46 26.518692108           ~ 9 0
20 LEDA 4684932 G 17 09 03.618 -23 27 44.98   17.61   14.98   ~ 8 0
21 2MASX J17091029-2233179 GiG 17 09 10.290 -22 33 17.92   18.27   15.81   ~ 10 0
22 6dFGS gJ170913.4-234547 G 17 09 13.4239816320 -23 45 47.003540472   18.21   16.74   ~ 2 0
23 ICRF J170928.2-222650 GiG 17 09 28.28765097 -22 26 50.5255394   15.94   14.66   ~ 15 0
24 2MASX J17092925-2259155 G 17 09 29.25 -22 59 15.5           ~ 1 0
25 6dFGS gJ170933.2-223240 G 17 09 33.22 -22 32 39.6   18.52   16.47   ~ 5 0
26 2MASX J17093341-2350245 AG? 17 09 33.41 -23 50 24.5           ~ 2 0
27 2MASX J17093394-2238225 G 17 09 33.9575472216 -22 38 22.248250584           ~ 3 0
28 2MASX J17093810-2305055 G 17 09 38.10 -23 05 05.5           ~ 1 0
29 2MASX J17093813-2358058 G 17 09 38.1226654968 -23 58 05.494359324   17.76   16.09   ~ 3 0
30 2MASX J17094318-2231395 G 17 09 43.18 -22 31 39.5           ~ 1 0
31 2MASS J17094469-2346531 AG? 17 09 44.6975616504 -23 46 53.193817956           ~ 7 0
32 6dFGS gJ170951.8-231304 G 17 09 51.7819748328 -23 13 04.140821532   18.05   16.36   ~ 3 0
33 2MASX J17095391-2250048 GiG 17 09 53.914 -22 50 04.85           ~ 8 0
34 6dFGS gJ170956.6-241631 G 17 09 56.550 -24 16 30.75   17.08   17.55   ~ 3 0
35 6dFGS gJ171002.5-231631 G 17 10 02.4468224808 -23 16 30.998630316   18.43   16.92   ~ 2 0
36 2MASX J17100581-2315138 G 17 10 05.81 -23 15 13.8           ~ 1 0
37 2MASX J17101464-2333587 G 17 10 14.6013356496 -23 33 58.367636928   15.87   15.02   ~ 2 0
38 6dFGS gJ171019.3-221722 G 17 10 19.307 -22 17 21.89   18.14   16.22   ~ 5 0
39 LEDA 4682915 EmG 17 10 30.9359553360 -23 38 39.505498404   15.84   13.98   ~ 11 0
40 2MASX J17103573-2329248 G 17 10 35.73 -23 29 24.8           ~ 1 0
41 2MASX J17104066-2324228 G 17 10 40.66 -23 24 22.8           ~ 1 0
42 2MASX J17104160-2411341 G 17 10 41.609 -24 11 34.12           ~ 6 0
43 LEDA 4684942 G 17 10 41.8755575832 -23 13 35.079670416   17.26   15.60   ~ 8 0
44 LEDA 4684410 G 17 10 43.989 -23 13 59.84   18.11   16.29   ~ 8 0
45 2MASX J17104452-2359408 G 17 10 44.52 -23 59 40.8           ~ 1 0
46 2MASX J17104522-2247088 G 17 10 45.22 -22 47 08.8           ~ 1 0
47 2MASX J17104588-2319238 G 17 10 45.88 -23 19 23.8           ~ 1 0
48 2MASX J17104954-2336246 G 17 10 49.5277076856 -23 36 24.706732032   17.76   16.25   ~ 2 0
49 LEDA 4684413 EmG 17 10 58.4579921232 -22 59 27.078892404   17.35   15.40   ~ 8 0
50 [DWN2015] OPH J171101.25-231107 G 17 11 01.25 -23 11 07.0           ~ 1 0
51 LEDA 4682914 G 17 11 11.8964499936 -23 54 50.341286700   16.37   16.55   ~ 8 0
52 2MASX J17112078-2234457 GiG 17 11 20.7733729632 -22 34 46.008299964   16.14   14.21   ~ 10 0
53 2MASX J17112119-2318497 GiG 17 11 21.196 -23 18 49.78           ~ 9 0
54 2MASX J17112206-2305297 G 17 11 22.06 -23 05 29.7           ~ 1 0
55 6dFGS gJ171124.0-230043 G 17 11 24.0231572256 -23 00 42.221361672   17.92   16.29   ~ 3 0
56 2MASX J17112592-2318507 G 17 11 25.920 -23 18 50.78   17.91   16.45   ~ 2 0
57 LEDA 3099040 EmG 17 11 27.1413215184 -23 09 22.123055772   20.19   17.18   ~ 9 0
58 2MASX J17112722-2323097 G 17 11 27.22 -23 23 09.7           ~ 1 0
59 2MASX J17112794-2404348 G 17 11 27.94 -24 04 34.8           ~ 1 0
60 2MASX J17112802-2344197 G 17 11 28.02 -23 44 19.7           ~ 1 0
61 2MASX J17113574-2413554 GiG 17 11 35.7440439624 -24 13 55.342380468           ~ 9 0
62 2MASX J17113598-2303057 G 17 11 35.984 -23 03 05.75           ~ 7 0
63 LEDA 3099045 G 17 11 37.500 -22 58 45.75   17.41   15.71   ~ 9 0
64 LEDA 3099046 G 17 11 39.6 -23 50 54           ~ 2 0
65 LEDA 4684951 G 17 11 43.440 -23 31 05.71   16.74   16.01   ~ 8 0
66 2MASX J17114409-2303397 GiG 17 11 44.099 -23 03 39.70           ~ 9 0
67 2MASX J17114534-2308447 G 17 11 45.344 -23 08 44.70           ~ 7 0
68 2MASX J17115130-2301363 GiG 17 11 51.306 -23 01 36.32           ~ 9 0
69 2MASX J17115542-2309423 GiG 17 11 55.430 -23 09 42.33           ~ 14 0
70 2MASX J17115651-2315013 G 17 11 56.514 -23 15 01.34           ~ 4 0
71 2MASX J17115666-2302503 G 17 11 56.668 -23 02 50.34           ~ 6 0
72 2MASX J17115724-2302113 GiG 17 11 57.246 -23 02 11.33           ~ 9 0
73 6dFGS gJ171157.5-232939 G 17 11 57.45 -23 29 38.6   18.76   16.81   ~ 3 0
74 LEDA 4682905 Sy2 17 11 57.664 -23 42 07.34   18.16   16.55   ~ 6 0
75 2MASX J17115865-2438004 G 17 11 58.6868237856 -24 38 00.504159828           ~ 7 0
76 6dFGS gJ171158.9-235908 G 17 11 58.828 -23 59 08.34   16.60   15.31   ~ 2 0
77 LEDA 3099053 G 17 12 06.973 -23 24 05.33   18.20   16.41   ~ 9 0
78 2MASX J17120908-2328263 G 17 12 09.0607726464 -23 28 26.650191432           ~ 13 0
79 2MASX J17121090-2333003 G 17 12 10.90 -23 33 00.3           ~ 1 0
80 6dFGS gJ171211.6-222752 G 17 12 11.609 -22 27 51.31   18.38   16.28   ~ 2 0
81 [DWN2015] OPH J171212.61-232501 G 17 12 12.61 -23 25 01.0           ~ 1 0
82 [DWN2015] OPH J171216.71-231931 G 17 12 16.71 -23 19 31.0           ~ 1 0
83 [DWN2015] OPH J171217.22-232537 G 17 12 17.22 -23 25 37.0           ~ 1 0
84 2MASX J17121796-2303422 G 17 12 17.96 -23 03 42.2           ~ 1 0
85 [DWN2015] OPH J171218.97-231921 G 17 12 18.97 -23 19 21.0           ~ 1 0
86 2MASX J17121895-2322192 GiG 17 12 18.9767941320 -23 22 19.105839768           ~ 11 0
87 2MASX J17121970-2308288 G 17 12 19.7089495920 -23 08 28.338523800           ~ 3 0
88 2MASX J17121976-2315418 GiG 17 12 19.768 -23 15 41.80           ~ 10 0
89 2MASX J17121989-2324187 G 17 12 19.8966280872 -23 24 18.498251592           ~ 7 0
90 [DWN2015] OPH J171220.15-232343 G 17 12 20.15 -23 23 43.0           ~ 1 0
91 [DWN2015] OPH J171220.68-232054 G 17 12 20.68 -23 20 54.0           ~ 1 0
92 2MASX J17122070-2318318 G 17 12 20.7006707640 -23 18 31.692090456           ~ 10 0
93 2MASX J17122085-2310048 G 17 12 20.8520233008 -23 10 04.810461384           ~ 7 0
94 2MASX J17122092-2316108 G 17 12 20.9370567816 -23 16 10.874931816   16.90   15.91   ~ 2 0
95 2MASX J17122113-2329568 GiG 17 12 21.130 -23 29 56.81           ~ 8 0
96 [DWN2015] OPH J171221.60-232528 G 17 12 21.60 -23 25 28.0           ~ 1 0
97 2MASX J17122214-2326048 GiG 17 12 22.1370388704 -23 26 04.578787212           ~ 11 0
98 2MASX J17122302-2322518 G 17 12 23.02 -23 22 51.8           ~ 1 0
99 [DWN2015] OPH J171223.09-232156 G 17 12 23.09 -23 21 56.0           ~ 1 0
100 LEDA 3099058 G 17 12 23.2390611600 -22 31 57.828913896   19.33   16.87   ~ 4 0
101 2MASXI J1712239-225159 G 17 12 23.9 -22 51 59           ~ 1 0
102 NAME Oph Cluster ClG 17 12 24.7 -23 21 01           ~ 273 0
103 [DWN2015] OPH J171225.43-232146 G 17 12 25.43 -23 21 46.0           ~ 1 0
104 [DWN2015] OPH J171226.83-232249 G 17 12 26.83 -23 22 49.0           ~ 1 0
105 [DWN2015] OPH J171226.86-234327 G 17 12 26.86 -23 43 27.0           ~ 1 0
106 [DWN2015] OPH J171227.36-232225 G 17 12 27.36 -23 22 25.0           ~ 1 0
107 2MASX J17122774-2322108 BiC 17 12 27.744 -23 22 10.82           ~ 18 0
108 2MASX J17122782-2308108 G 17 12 27.825 -23 08 10.83           ~ 3 0
109 2MASX J17122884-2308038 G 17 12 28.843 -23 08 03.83           ~ 3 0
110 [DWN2015] OPH J171229.40-232241 G 17 12 29.40 -23 22 41.0           ~ 1 0
111 [DWN2015] OPH J171231.55-232324 G 17 12 31.55 -23 23 24.0           ~ 1 0
112 LEDA 3099061 G 17 12 33.259 -23 07 34.82   17.81   14.07   ~ 9 0
113 2MASX J17123580-2319208 G 17 12 35.808 -23 19 20.82           ~ 6 0
114 LEDA 4684952 G 17 12 35.838 -22 22 49.82   18.01   15.67   ~ 8 0
115 LEDA 4684408 G 17 12 36.387 -23 21 13.82   16.84   16.36   ~ 9 0
116 [DWN2015] OPH J171236.61-232056 G 17 12 36.61 -23 20 56.0           ~ 1 0
117 2MASX J17123843-2331458 G 17 12 38.430 -23 31 45.81           ~ 3 0
118 6dFGS gJ171241.0-232943 G 17 12 40.96 -23 29 42.8   18.20   16.54   ~ 3 0
119 2MASX J17124256-2324167 G 17 12 42.5844999984 -23 24 17.239524012           ~ 7 0
120 2MASX J17124278-2435477 GiG 17 12 42.788 -24 35 47.70           ~ 11 0
121 2MASX J17124767-2301517 G 17 12 47.673 -23 01 51.77   18.16   16.60   ~ 2 0
122 [DWN2015] OPH J171249.23-234834 G 17 12 49.23 -23 48 34.0           ~ 1 0
123 2MASX J17124957-2307207 G 17 12 49.570 -23 07 20.75           ~ 6 0
124 2MASX J17125134-2415096 GiG 17 12 51.343 -24 15 09.69           ~ 9 0
125 [DWN2015] OPH J171253.26-231705 G 17 12 53.26 -23 17 05.0           ~ 1 0
126 LEDA 3099063 G 17 12 55.063 -22 57 00.04   18.05   17.42   ~ 11 0
127 2MASX J17125738-2358196 G 17 12 57.4140097944 -23 58 19.594763832           ~ 6 0
128 [DWN2015] OPH J171301.84-223836 G 17 13 01.84 -22 38 36.0           ~ 1 0
129 2MASX J17130287-2354020 G 17 13 02.8883893752 -23 54 02.456535708           ~ 3 0
130 2MASX J17130678-2255350 G 17 13 06.8183300376 -22 55 35.156710020           ~ 3 0
131 2MASX J17131749-2334290 GiG 17 13 17.490 -23 34 29.02           ~ 9 0
132 2MASX J17132392-2334506 G 17 13 23.92 -23 34 50.6           ~ 1 0
133 2MASX J17132420-2339146 G 17 13 24.207 -23 39 14.64           ~ 6 0
134 2MASX J17132646-2332016 G 17 13 26.470 -23 32 01.65   16.10   16.32   ~ 2 0
135 2MASX J17132844-2308406 G 17 13 28.44 -23 08 40.6           ~ 1 0
136 6dFGS gJ171329.7-223408 G 17 13 29.6621316744 -22 34 08.080843044   19.53   17.11   ~ 3 0
137 2MASX J17133402-2337336 G 17 13 34.028 -23 37 33.66   17.87   16.77   ~ 2 0
138 6dFGS gJ171339.1-223929 G 17 13 39.0836853336 -22 39 28.820272356   18.38   16.53   ~ 3 0
139 [DWN2015] OPH J171339.33-231814 G 17 13 39.33 -23 18 14.0           ~ 1 0
140 2MASX J17134226-2353126 G 17 13 42.26 -23 53 12.6           ~ 1 0
141 LEDA 3099065 G 17 13 50.2706577120 -22 16 10.372047276   18.81   16.62   ~ 4 0
142 2MASXI J1713516-240757 G 17 13 51.6 -24 07 57           ~ 1 0
143 LEDA 3099066 G 17 13 51.9360813864 -23 03 28.885322304   16.86   17.14   ~ 9 0
144 2MASX J17135221-2321556 G 17 13 52.214 -23 21 55.65   16.53   15.75   ~ 3 0
145 2MASX J17135490-2316186 G 17 13 54.9 -23 16 19           ~ 2 0
146 2MASX J17135847-2251566 G 17 13 58.476 -22 51 56.68           ~ 6 0
147 LEDA 3099070 G 17 14 01.728 -23 13 02.68   15.55   13.92   ~ 9 0
148 2MFGC 13750 GiG 17 14 09.719 -23 31 53.67           ~ 19 1
149 2MASX J17142206-2300182 G 17 14 22.06 -23 00 18.2           ~ 1 0
150 LEDA 3099073 G 17 14 23.862 -23 10 48.22   17.31   15.62   ~ 9 0
151 2MASX J17142479-2313472 GiG 17 14 24.800 -23 13 47.23           ~ 9 0
152 2MASX J17143041-2408063 G 17 14 30.41 -24 08 06.3           ~ 1 0
153 LEDA 4683062 G 17 14 58.132 -22 21 30.00   18.73   15.47   ~ 8 0
154 2MASX J17150845-2354140 G 17 15 08.452 -23 54 14.01           ~ 3 0
155 LEDA 4684406 Sy1 17 15 09.251 -23 41 02.01   16.85   16.60   ~ 8 0
156 2MASX J17151484-2326579 G 17 15 14.84 -23 26 57.9           ~ 1 0
157 2MASX J17151503-2301319 G 17 15 15.03 -23 01 31.9           ~ 1 0
158 6dFGS gJ171545.3-234005 G 17 15 45.3221161656 -23 40 04.889801316   19.77   17.65   ~ 3 0
159 2MASX J17155885-2342043 G 17 15 58.857 -23 42 04.30           ~ 3 0
160 2MASX J17165090-2324074 G 17 16 50.9317815528 -23 24 07.609434012           ~ 6 0
161 6dFGS gJ171810.0-231358 G 17 18 10.005 -23 13 58.42   18.79   16.76   ~ 2 0
162 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14433 0
163 Suzaku J1759-3450 ClG 18 02 37.70 -34 50 14.4           ~ 8 0
164 NAME Local Void vid 18 38 +18.0           ~ 199 0
165 ClG J2334+4851 ClG 23 34 02.7 +48 51 08           ~ 6 1

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