2011ApJ...737...86C

Query : 2011ApJ...737...86C

2011ApJ...737...86C - Astrophys. J., 737, 86 (2011/August-3)

Ultra-compact dwarfs in the Coma cluster.

CHIBOUCAS K., TULLY R.B., MARZKE R.O., PHILLIPPS S., PRICE J., PENG E.W., TRENTHAM N., CARTER D. and HAMMER D.

Abstract (from CDS):

We have undertaken a spectroscopic search for ultra-compact dwarf galaxies (UCDs) in the dense core of the dynamically evolved, massive Coma cluster as part of the Hubble Space Telescope/Advanced Camera for Surveys (HST/ACS) Coma Cluster Treasury Survey. UCD candidates were initially chosen based on color, magnitude, degree of resolution within the ACS images, and the known properties of Fornax and Virgo UCDs. Follow-up spectroscopy with Keck/Low-Resolution Imaging Spectrometer confirmed 27 candidates as members of the Coma cluster, a success rate >60% for targeted objects brighter than MR= -12. Another 14 candidates may also prove to be Coma members, but low signal-to-noise spectra prevent definitive conclusions. An investigation of the properties and distribution of the Coma UCDs finds these objects to be very similar to UCDs discovered in other environments. The Coma UCDs tend to be clustered around giant galaxies in the cluster core and have colors/metallicity that correlate with the host galaxy. With properties and a distribution similar to that of the Coma cluster globular cluster population, we find strong support for a star cluster origin for the majority of the Coma UCDs. However, a few UCDs appear to have stellar population or structural properties which differentiate them from the old star cluster populations found in the Coma cluster, perhaps indicating that UCDs may form through multiple formation channels.

Abstract Copyright: ∼

Journal keyword(s): galaxies: clusters: individual: Coma - galaxies: dwarf - galaxies: star clusters: general - globular clusters: general

VizieR on-line data: <Available at CDS (J/ApJ/737/86): table2.dat table3.dat table4.dat>

Nomenclature: Tables 2-4: [CTM2010] NNNNNNN N=78 among (Nos 10355-8039100).

Simbad objects: 95

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Number of rows : 95
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 NAME NGC 1023 Group GrG 02 39 37.9 +39 20 51           ~ 81 0
2 ACO S 373 ClG 03 38 29.4 -35 27 08           ~ 2029 0
3 NAME NGC 1566 Group GrG 04 20 00.6 -54 56 17           ~ 180 0
4 NAME M 81-82 Group GrG 09 55 +69.1           ~ 758 0
5 NAME Hydra I Cluster ClG 10 36 36.0 -27 31 04           ~ 905 1
6 NGC 3311 EmG 10 36 42.821 -27 31 42.02   11.93 10.93 10.00 9.67 ~ 310 2
7 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
8 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
9 ACO 3526 ClG 12 48 49.2 -41 18 17           ~ 1154 2
10 [CTM2010] 190183 G 12 59 30.6995 +27 59 25.881       23.22 23.93 ~ 1 0
11 [CTM2010] 191006 G 12 59 32.7534 +27 58 31.239       22.88 22.60 ~ 4 0
12 [CTM2010] 190875 G 12 59 34.0430 +28 00 06.928       23.38 23.69 ~ 1 0
13 NGC 4874 LIN 12 59 35.7093764280 +27 57 33.293892204 13.01 13.7 12.71 12.27 11.386 ~ 814 3
14 [CTM2010] 192636 G 12 59 36.0394 +27 58 05.202       21.67 22.37 ~ 2 0
15 [CTM2010] 120985 G 12 59 36.1882 +28 01 12.299       22.04 22.31 ~ 4 0
16 [CTM2010] 1039715 G 12 59 38.9392 +27 57 33.092       22.65 22.69 ~ 1 0
17 [CTM2010] 121666 G 12 59 39.1623 +28 01 11.232       21.65 21.68 ~ 5 0
18 [CTM2010] 1041346 G 12 59 39.4006 +27 58 40.047       21.65 21.89 ~ 5 0
19 [CTM2010] 195526 G 12 59 40.3899 +27 57 30.905       22.12 21.95 ~ 5 0
20 [CTM2010] 1039188 G 12 59 41.1987 +27 57 10.907       21.97 22.10 ~ 5 0
21 [CTM2010] 1041400 G 12 59 41.6895 +27 58 41.757       22.78 22.73 ~ 2 0
22 [CTM2010] 195614 G 12 59 41.8837 +27 58 48.633       22.28 22.39 ~ 5 0
23 [CTM2010] 1041508 G 12 59 43.0518 +27 58 45.678       22.62 22.95 ~ 3 0
24 [CTM2010] 196829 ? 12 59 43.3704 +27 57 13.173       23.51 23.93 ~ 1 0
25 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
26 [CTM2010] 196790 G 12 59 44.9144 +27 58 54.128       21.86 21.90 ~ 6 0
27 [CTM2010] 123628 ? 12 59 45.2783 +28 00 20.022       23.99 24.14 ~ 1 0
28 IC 3998 G 12 59 46.7810952336 +27 58 25.887811872 16.07 15.909 14.61 14.341 13.605 ~ 97 0
29 [CTM2010] 180960 * 12 59 47.9993 +27 58 40.418       22.68 22.58 ~ 1 0
30 [CTM2010] 1039346 * 12 59 48.0212 +27 57 18.048       22.21 22.25 ~ 1 0
31 [CTM2010] 1038942 G 12 59 48.0601 +27 57 00.902       22.94 23.11 ~ 1 0
32 [CTM2010] 1039079 G 12 59 49.6582 +27 57 06.389       22.70 22.88 ~ 1 0
33 [CTM2010] 181622 ? 12 59 51.0095 +27 58 22.812       23.93 24.09 ~ 1 0
34 [CTM2010] 1037297 G 12 59 51.2805 +27 55 54.167       22.89 23.04 ~ 1 0
35 [CTM2010] 1039823 * 12 59 51.3391 +27 57 37.823       21.06 21.44 ~ 1 0
36 [CTM2010] 181520 ? 12 59 52.1704 +27 59 59.643       23.49 23.58 ~ 1 0
37 [CTM2010] 182306 G 12 59 52.4414 +27 57 24.331       23.46 23.49 ~ 1 0
38 [CTM2010] 1037801 G 12 59 52.4817 +27 56 17.712       21.17 21.27 ~ 1 0
39 [CTM2010] 182263 ? 12 59 53.1299 +27 58 19.750       23.58 24.07 ~ 1 0
40 [CTM2010] 182204 G 12 59 53.4687 +27 58 55.441       23.06 23.29 ~ 3 0
41 [CTM2010] 1043225 G 12 59 56.7297 +27 59 57.947         22.72 ~ 3 0
42 [CTM2010] 1042772 G 12 59 57.4805 +27 59 38.858       23.22 23.37 ~ 1 0
43 [CTM2010] 1040263 G 12 59 58.5095 +27 57 55.820       22.91 22.81 ~ 2 0
44 [CTM2010] 1042830 G 13 00 01.8018 +27 59 41.323       21.83 21.79 ~ 4 0
45 [CTM2010] 1038505 G 13 00 05.3796 +27 56 44.327       23.10 23.12 ~ 1 0
46 [CTM2010] 1042434 G 13 00 06.7017 +27 59 24.178       23.49   ~ 1 0
47 NGC 4889 EmG 13 00 08.097 +27 58 37.29 12.93 13.0 11.30 11.652 10.906 ~ 742 1
48 [CTM2010] 242857 G 13 00 11.6070 +27 55 22.791       22.38 22.43 ~ 5 0
49 [CTM2010] 230603 ? 13 00 15.0806 +27 54 20.131       23.72 23.87 ~ 1 0
50 [CTM2010] 230649 G 13 00 15.5274 +27 54 28.790       22.42 22.41 ~ 1 0
51 [CTM2010] 160141 G 13 00 16.5769 +27 58 26.923       22.91 22.78 ~ 3 0
52 [CTM2010] 160317 ? 13 00 17.4316 +27 58 53.842       23.61 24.11 ~ 1 0
53 [CTM2010] 160373 * 13 00 18.3179 +27 59 30.447       21.73 21.83 ~ 1 0
54 [CTM2010] 160540 G 13 00 18.5193 +27 58 29.988       22.88 23.25 ~ 1 0
55 [CTM2010] 161244 G 13 00 20.1962 +27 58 02.028       22.60 22.67 ~ 3 0
56 [CTM2010] 161617 * 13 00 21.4526 +27 58 00.057       22.80 22.81 ~ 1 0
57 [CTM2010] 161324 ? 13 00 22.4084 +28 00 05.527       23.60 23.75 ~ 1 0
58 [CTM2010] 232327 ? 13 00 24.7302 +27 54 34.942       23.31 23.50 ~ 1 0
59 [CTM2010] 162819 G 13 00 26.3489 +27 57 37.713       23.41 23.44 ~ 1 0
60 [CTM2010] 163341 G 13 00 29.3951 +27 57 19.822       22.25 22.38 ~ 4 0
61 [CTM2010] 1045724 G 13 00 29.7986 +28 01 36.350       22.32 22.51 ~ 2 0
62 [CTM2010] 163400 G 13 00 30.9054 +27 58 27.970       23.42 23.40 ~ 4 0
63 [CTM2010] 92415 G 13 00 32.2511 +28 00 12.690       22.86 22.90 ~ 4 0
64 [CTM2010] 163575 G 13 00 32.6064 +27 59 10.684       22.52 22.66 ~ 4 0
65 [CTM2010] 1041404 G 13 00 34.5117 +27 58 42.601       21.43 21.49 ~ 1 0
66 [CTM2010] 221051 * 13 00 34.6692 +27 55 06.109       21.61 21.80 ~ 1 0
67 [CTM2010] 1044234 * 13 00 35.4089 +28 00 37.093       21.82 21.91 ~ 1 0
68 [CTM2010] 92668 G 13 00 36.1011 +28 02 28.343       23.52 23.48 ~ 1 0
69 [CTM2010] 150880 G 13 00 36.4041 +27 58 24.275       22.70 22.84 ~ 4 0
70 [CTM2010] 221365 G 13 00 36.9434 +27 55 28.528       23.32 23.77 ~ 1 0
71 [CTM2010] 151061 G 13 00 37.1777 +27 58 07.418       23.75 24.09 ~ 1 0
72 [CTM2010] 151072 G 13 00 37.8258 +27 58 40.602       21.48 21.60 ~ 6 0
73 [CTM2010] 1043666 * 13 00 38.4595 +28 00 15.642       22.04 22.19 ~ 1 0
74 [CTM2010] 221570 ? 13 00 38.7195 +27 56 48.227       23.70 23.99 ~ 1 0
75 [CTM2010] 150000 G 13 00 39.9570 +27 59 48.200       21.50   ~ 4 0
76 [CTM2010] 1040963 G 13 00 40.2100 +27 58 23.052       23.25 23.51 ~ 1 0
77 [CTM2010] 151353 ? 13 00 40.3418 +27 58 50.663       23.71 24.27 ~ 1 0
78 IC 4041 EmG 13 00 40.8541511496 +27 59 47.807863512 16.19 15.88 14.77 14.343 13.733 ~ 107 0
79 [CTM2010] 10388 * 13 00 41.3306 +28 04 42.012       21.68 22.09 ~ 1 0
80 [CTM2010] 81133 ? 13 00 41.7590 +28 01 00.638         23.99 ~ 1 0
81 [CTM2010] 10355 * 13 00 41.9604 +28 05 34.170       21.56 22.14 ~ 1 0
82 IC 4042 AGN 13 00 42.7595583480 +27 58 16.579136856 15.44 15.272 14.01 13.713 13.025 ~ 105 0
83 [CTM2010] 10679 G 13 00 42.8100 +28 05 11.373       23.72 23.48 ~ 1 0
84 [CTM2010] 81669 G 13 00 44.6775 +28 01 44.606       23.01 23.04 ~ 4 0
85 [CTM2010] 1042863 G 13 00 44.8792 +27 59 41.728         22.77 ~ 1 0
86 [CTM2010] 4000025 G 13 00 47.8491 +27 59 39.957           ~ 1 0
87 [CTM2010] 2000005 G 13 00 48.7793 +28 01 11.212       23.19 23.19 ~ 3 0
88 [CTM2010] 1044251 G 13 00 50.2918 +28 00 37.498       22.31 22.30 ~ 3 0
89 NGC 4908 LIN 13 00 51.5428778808 +28 02 34.346182596 15.05 14.9 13.58 13.273 12.566 ~ 125 0
90 [CTM2010] 1044847 G 13 00 51.8518 +28 01 01.448       22.59   ~ 1 0
91 IC 4051 EmG 13 00 54.4630403184 +28 00 27.502143300 15.04 14.8 13.50 13.003 12.305 ~ 218 0
92 [CTM2010] 1045115 * 13 00 55.0086 +28 01 12.352       21.62   ~ 1 0
93 [CTM2010] 8039100 * 13 01 00.5896 +27 59 16.563       22.52   ~ 1 0
94 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1178 0
95 ACO S 740 ClG 13 43 32 -38 11.1           ~ 21 0

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