2007ApJ...668L..35W

Query : 2007ApJ...668L..35W

2007ApJ...668L..35W - Astrophys. J., 668, L35-L38 (2007/October-2)

Ultracompact dwarf candidates in the Hydra cluster.

WEHNER E.M.H. and HARRIS W.E.

Abstract (from CDS):

NGC 3311, the giant cD galaxy in the Hydra Cluster (A1060), has one of the largest globular cluster systems known. We describe new Gemini GMOS (g', i') photometry of the NGC 3311 field which reveals that the red, metal-rich side of its globular cluster population extends smoothly upward into the mass range associated with the new class of ultracompact dwarfs (UCDs). We identify 29 UCD candidates with estimated masses >6x106 M☉ and discuss their characteristics. This UCD-like sequence is the most well-defined one yet seen, and reinforces current ideas that the high-mass end of the globular cluster sequence merges continuously into the UCD sequence, which connects in turn to the E galaxy structural sequence.

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Journal keyword(s): Galaxies: Elliptical and Lenticular, cD - Galaxies: Individual: NGC Number: NGC 3311 - Galaxies: Star Clusters

Nomenclature: Table 1: [WH2007] UCD NN (Nos 1-29).

Simbad objects: 36

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Number of rows : 36
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 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
2 ACO S 373 ClG 03 38 29.4 -35 27 08           ~ 2029 0
3 [WH2007] UCD 2 Gl? 10 36 32.456 -27 29 24.88           ~ 4 0
4 [WH2007] UCD 8 Gl? 10 36 34.899 -27 29 44.90           ~ 4 0
5 NGC 3309 rG 10 36 35.6607096792 -27 31 05.732321664   11.98 11.78 10.34 10.51 ~ 167 0
6 NAME Hydra I Cluster ClG 10 36 36.0 -27 31 04           ~ 905 1
7 [WH2007] UCD 16 G 10 36 36.06 -27 32 20.2     23.03   21.81 ~ 2 0
8 [MMH2011] 66 G 10 36 38.98 -27 31 23.7     23.24   21.91 ~ 5 0
9 [SGM95] 101 Gl? 10 36 39.316 -27 30 53.73           ~ 4 0
10 [WH2007] UCD 6 G 10 36 40.61 -27 32 07.1     22.54   21.55 ~ 2 0
11 [WH2007] UCD 17 G 10 36 40.978 -27 30 20.10           ~ 1 0
12 [WH2007] UCD 3 Gl? 10 36 41.160 -27 31 21.90           ~ 2 0
13 [WH2007] UCD 12 Gl? 10 36 41.249 -27 31 07.80           ~ 2 0
14 [WH2007] UCD 18 G 10 36 41.290 -27 31 35.55           ~ 1 0
15 [WH2007] UCD 25 G 10 36 41.556 -27 31 23.32           ~ 1 0
16 [WH2007] UCD 21 Gl? 10 36 42.100 -27 31 05.70           ~ 2 0
17 [WH2007] UCD 11 Gl? 10 36 42.354 -27 31 00.00           ~ 2 0
18 NGC 3311 EmG 10 36 42.821 -27 31 42.02   11.93 10.93 10.00 9.67 ~ 310 2
19 [WH2007] UCD 13 G 10 36 43.186 -27 29 59.72           ~ 1 0
20 [WH2007] UCD 1 G 10 36 43.320 -27 29 24.19           ~ 1 0
21 [WH2007] UCD 9 G 10 36 43.487 -27 30 26.04           ~ 1 0
22 [WH2007] UCD 14 G 10 36 43.60 -27 32 18.3     22.84   21.57 ~ 2 0
23 [WH2007] UCD 27 G 10 36 44.69 -27 30 49.4     23.04   21.88 ~ 2 0
24 [WH2007] UCD 5 G 10 36 44.923 -27 34 20.21           ~ 3 0
25 [WH2007] UCD 22 G 10 36 45.11 -27 31 54.6     22.96   21.74 ~ 2 0
26 [WH2007] UCD 20 G 10 36 45.71 -27 31 31.7     22.78   21.66 ~ 2 0
27 [WH2007] UCD 4 G 10 36 47.64 -27 31 11.6     22.24   21.09 ~ 2 0
28 [WH2007] UCD 24 G 10 36 47.876 -27 29 19.14           ~ 1 0
29 [WH2007] UCD 15 G 10 36 48.24 -27 32 27.1     22.81   21.63 ~ 2 0
30 [WH2007] UCD 29 G 10 36 48.93 -27 31 54.7     23.05   21.89 ~ 2 0
31 [WH2007] UCD 10 G 10 36 49.500 -27 30 48.07           ~ 1 0
32 [WH2007] UCD 7 G 10 36 50.016 -27 31 57.35           ~ 1 0
33 [WH2007] UCD 23 G 10 36 50.82 -27 32 03.7     23.05   21.82 ~ 4 0
34 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
35 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1178 0
36 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3

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