2009AJ....137.4361D

Query : 2009AJ....137.4361D

2009AJ....137.4361D - Astron. J., 137, 4361-4367 (2009/May-0)

Scl-dE1 GC1: an extended globular cluster in a low-luminosity dwarf elliptical galaxy.

DA COSTA G.S., GREBEL E.K., JERJEN H., REJKUBA M. and SHARINA M.E.

Abstract (from CDS):

We report the discovery from Hubble Space Telescope/ACS images of an extended globular cluster, denoted by Scl-dE1 GC1, in the Sculptor Group dwarf Elliptical galaxy Scl-dE1 (Sc22). The distance of the dE is determined as 4.3±0.25 Mpc from the I magnitude of the tip of the red giant branch in the color-magnitude diagram. At this distance the half-light radius of Scl-dE1 GC1 is ∼22 pc, placing it among the largest clusters known, particularly for globular clusters associated with dwarf galaxies. The absolute magnitude of Scl-dE1 GC1 is MV= -6.7 and, to within the photometric uncertainties of the data, the cluster stellar population appears indistinguishable from that of the dE. We suggest that there may be two modes of globular cluster formation in dwarf galaxies, a "normal" mode with half-light radii of typically 3 pc, and an "extended" mode with half-light radii of ∼10 pc or more.

Abstract Copyright: ∼

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

Nomenclature: NAME Scl-dE1 GC1 N=1.

Simbad objects: 55

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Number of rows : 55
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 [BHE2002] WLM 1 GlC 00 01 49.48 -15 27 30.7   16.64 16.06     ~ 23 0
2 MCG-03-01-015 G 00 01 57.9 -15 27 50   11.50 11.10 10.93   ~ 782 2
3 Cl Lindsay 1 Cl* 00 03 53.50 -73 28 15.0   11.7       ~ 125 0
4 NAME Sculptor dE1 GiG 00 23 51.7 -24 42 18   17.73       ~ 71 1
5 NAME Scl-dE1 GC1 GlC 00 23 52.69 -24 41 58.0           ~ 8 0
6 ESO 28-19 Cl* 00 24 45.98 -72 47 37.9   11.6 12.05     ~ 152 0
7 NGC 147 GiG 00 33 12.120 +48 30 31.46   12.0 9.5     ~ 720 1
8 NGC 185 Sy2 00 38 57.9400026024 +48 20 15.035874648   9.10 9.2     ~ 840 1
9 M 110 GiG 00 40 22.0572349992 +41 41 07.507220136   8.92 8.07     ~ 1370 1
10 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
11 ESO 51-3 Cl* 00 48 50 -69 52.2   16.2       ~ 57 0
12 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
13 NGC 339 OpC 00 57 47.62 -74 28 14.6 13.23 12.94 12.21   11.20 ~ 157 0
14 NAME Scl Group GrG 01 00 06 -33 44.2           ~ 526 0
15 NGC 416 Cl* 01 07 59.03 -72 21 20.5 12.73 12.55 11.76   10.71 ~ 156 1
16 NAME M33-EC1 Cl* 01 32 58.50 +29 52 03.0           ~ 12 0
17 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
18 NAME Whiting 1 GlC 02 02 56.8 -03 15 10           ~ 177 0
19 NAME Fornax H1 Cl* 02 37 02.1 -34 11 00     16.59     ~ 107 0
20 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
21 ACO S 373 ClG 03 38 29.4 -35 27 08           ~ 2029 0
22 NAME Ret GlC 04 36 10.15 -58 51 34.8   14.00 14.25 13.50   ~ 177 1
23 NGC 1851 GlC 05 14 06.76 -40 02 47.6           ~ 1529 0
24 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
25 NGC 2419 GlC 07 38 08.51 +38 52 54.9     10.05     ~ 998 0
26 Koposov 2 GlC 07 58 17.00 +26 15 19.4           ~ 85 1
27 NAME M 81-82 Group GrG 09 55 +69.1           ~ 758 0
28 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4725 3
29 NAME Sextans C GlC 10 05 30.96 +00 04 15.4   15.5 13.9     ~ 354 1
30 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 517 1
31 NAME UMa I Galaxy G 10 34 52.80 +51 55 12.0     14.4     ~ 355 1
32 NAME Willman 1 G 10 49 21.0 +51 03 00     15.2     ~ 345 0
33 Koposov 1 GlC 11 59 18.40 +12 15 35.8           ~ 81 0
34 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
35 NGC 4605 GiG 12 39 59.2837284936 +61 36 32.822365392   10.94   10.35   ~ 347 2
36 NAME Cen A Group GrG 13 20 33.9 -44 58 51           ~ 274 0
37 LEDA 2815822 G 13 22 12.0 -42 43 51   18.5       ~ 41 0
38 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
39 M 51 Sy2 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4565 4
40 M 83 SBG 13 37 00.91920 -29 51 56.7400 8.85 8.11 7.52 7.21   ~ 2778 2
41 NGC 5237 EmG 13 37 39.056 -42 50 48.90   13.26 12.67 12.34   ~ 116 1
42 NAME Bootes II G 13 58 00.0 +12 51 00     15.4     ~ 269 0
43 NAME Bootes Dwarf Spheroidal Galaxy G 14 00 00.0 +14 30 00     12.8     ~ 491 0
44 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 3138 2
45 Cl Pal 5 GlC 15 16 05.30 -00 06 41.0   15.1       ~ 797 1
46 ACO 2151 ClG 16 05 15.0 +17 44 55           ~ 594 3
47 GCl 38 GlC 16 10 59.00 +14 57 42.0           ~ 399 0
48 [KK2000] 55 GrG 17 26 02 -80 11.7           ~ 6 0
49 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
50 Cl Arp 2 GlC 19 28 44.11 -30 21 20.3     12.41     ~ 384 0
51 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2661 2
52 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3274 0
53 M 2 GlC 21 33 27.02 -00 49 23.7     6.25     ~ 1114 1
54 NAME Galactic Bulge reg ~ ~           ~ 4794 0
55 NAME Local Group GrG ~ ~           ~ 9325 0

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