2011MNRAS.411.1386D

Query : 2011MNRAS.411.1386D

2011MNRAS.411.1386D - Mon. Not. R. Astron. Soc., 411, 1386-1394 (2011/February-3)

GLIMPSE-CO1: the most massive intermediate-age stellar cluster in the galaxy.

DAVIES B., BASTIAN N., GIELES M., SETH A.C., MENGEL S. and KONSTANTOPOULOS I.S.

Abstract (from CDS):

The stellar cluster GLIMPSE-C01 is a dense stellar system located in the Galactic plane. Though often referred to in the literature as an old globular cluster traversing the Galactic disc, previous observations do not rule out that it is an intermediate-age (less than a few Gyr) disc-borne cluster. Here, we present high-resolution near-infrared spectroscopy of over 50 stars in the cluster. We find an average radial velocity is consistent with being part of the disc, and determine the cluster's dynamical mass to be (8±3) {x} 104 M☉. Analysis of the cluster's M/L ratio, the location of the red clump and an extremely high stellar density, all suggest an age of 400-800 Myr for GLIMPSE-C01, much lower than that for a typical globular cluster. This evidence therefore leads us to conclude that GLIMPSE-C01 is a part of the disc population, and is the most massive Galactic intermediate-age cluster discovered to date.

Abstract Copyright: 2010 The Authors Monthly Notices of the Royal Astronomical Society2010 RAS

Journal keyword(s): techniques: spectroscopic - globular clusters: individual: GLIMPSE-C01

Nomenclature: Table 1: [DBG2011] NN (Nos 1-55).

Simbad objects: 62

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Number of rows : 62
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 Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
2 * alf Boo RG* 14 15 39.67207 +19 10 56.6730 2.46 1.18 -0.05 -1.03 -1.68 K1.5IIIFe-0.5 2417 1
3 Cl Westerlund 1 OpC 16 47 02.4 -45 51 07           ~ 655 1
4 NGC 6540 GlC 18 06 08.60 -27 45 55.0           ~ 145 0
5 Cl Stephenson 2 OpC 18 39 20 -06 01.7           ~ 102 0
6 [DBG2011] 36 * 18 48 47.85 -01 29 39.7           ~ 1 0
7 [DBG2011] 12 * 18 48 48.17 -01 29 59.3           ~ 1 0
8 [DBG2011] 51 * 18 48 48.61 -01 29 34.0           ~ 1 0
9 [DBG2011] 20 * 18 48 48.76 -01 29 50.0           ~ 1 0
10 2MASS J18484881-0129433 AB? 18 48 48.81840 -01 29 43.3752           ~ 2 0
11 [DBG2011] 45 * 18 48 48.90 -01 29 47.2           ~ 1 0
12 [DBG2011] 23 * 18 48 49.13 -01 30 06.2           ~ 1 0
13 [DBG2011] 21 * 18 48 49.13 -01 29 49.2           ~ 1 0
14 [DBG2011] 53 * 18 48 49.33 -01 29 51.5           ~ 1 0
15 [DBG2011] 3 * 18 48 49.39 -01 29 55.5           ~ 1 0
16 [DBG2011] 7 * 18 48 49.42 -01 30 02.4           ~ 1 0
17 [DBG2011] 18 * 18 48 49.48 -01 30 22.1           ~ 1 0
18 [DBG2011] 30 * 18 48 49.54 -01 29 54.4           ~ 1 0
19 [DBG2011] 8 * 18 48 49.54 -01 29 34.0           ~ 1 0
20 [DBG2011] 52 * 18 48 49.62 -01 29 49.2           ~ 1 0
21 [DBG2011] 26 * 18 48 49.63 -01 29 50.8           ~ 1 0
22 GLIMPSE C01 GlC 18 48 49.7 -01 29 50           ~ 60 0
23 [DBG2011] 42 * 18 48 49.76 -01 29 48.2           ~ 1 0
24 [DBG2011] 54 * 18 48 49.77 -01 29 49.2           ~ 1 0
25 [DBG2011] 2 * 18 48 49.77 -01 29 41.6           ~ 1 0
26 [DBG2011] 16 * 18 48 49.80 -01 30 00.7           ~ 1 0
27 [DBG2011] 15 * 18 48 49.84 -01 29 57.9           ~ 1 0
28 [DBG2011] 43 * 18 48 49.84 -01 29 50.0           ~ 1 0
29 [DBG2011] 44 * 18 48 49.92 -01 29 50.8           ~ 1 0
30 [DBG2011] 38 * 18 48 49.96 -01 30 02.4           ~ 1 0
31 [DBG2011] 46 * 18 48 49.96 -01 29 51.5           ~ 1 0
32 [DBG2011] 55 * 18 48 49.96 -01 29 39.7           ~ 1 0
33 [DBG2011] 33 * 18 48 49.96 +01 29 44.7           ~ 1 0
34 [DBG2011] 41 * 18 48 49.98 -01 29 53.5           ~ 1 0
35 [DBG2011] 40 * 18 48 49.99 -01 30 04.7           ~ 1 0
36 [DBG2011] 35 * 18 48 49.99 -01 29 47.2           ~ 1 0
37 [DBG2011] 24 * 18 48 50.10 -01 29 38.1           ~ 1 0
38 [DBG2011] 1 * 18 48 50.11 -01 29 50.0           ~ 1 0
39 [DBG2011] 22 * 18 48 50.17 -01 29 54.4           ~ 1 0
40 [DBG2011] 32 * 18 48 50.29 -01 29 50.8           ~ 1 0
41 [DBG2011] 28 * 18 48 50.35 -01 30 17.6           ~ 1 0
42 [DBG2011] 14 * 18 48 50.36 -07 29 44.7           ~ 1 0
43 [DBG2011] 17 * 18 48 50.36 -01 29 04.0           ~ 1 0
44 [DBG2011] 37 * 18 48 50.49 -01 29 34.0           ~ 1 0
45 [DBG2011] 34 * 18 48 50.51 -01 29 39.7           ~ 1 0
46 [DBG2011] 4 * 18 48 50.53 -01 29 25.9           ~ 1 0
47 [DBG2011] 31 * 18 48 50.56 -01 29 53.5           ~ 1 0
48 [DBG2011] 47 * 18 48 50.57 -01 29 47.2           ~ 1 0
49 [DBG2011] 50 * 18 48 50.69 -01 29 48.2           ~ 1 0
50 [DBG2011] 48 * 18 48 50.73 -01 29 59.8           ~ 1 0
51 [DBG2011] 29 * 18 48 50.74 -01 29 04.0           ~ 1 0
52 [DBG2011] 19 * 18 48 50.83 -01 29 53.6           ~ 1 0
53 [DBG2011] 5 * 18 48 51.08 -01 29 27.4           ~ 1 0
54 [DBG2011] 6 * 18 48 51.24 -01 29 41.1           ~ 1 0
55 [DBG2011] 39 * 18 48 51.25 -01 29 44.7           ~ 1 0
56 [DBG2011] 9 * 18 48 51.25 -01 29 43.3           ~ 1 0
57 [DBG2011] 27 * 18 48 51.30 -01 29 18.8           ~ 1 0
58 [DBG2011] 49 * 18 48 51.42 -01 29 43.3           ~ 1 0
59 [DBG2011] 13 * 18 48 51.62 -01 29 47.2           ~ 1 0
60 [DBG2011] 25 * 18 48 51.73 -01 29 50.8           ~ 1 0
61 [DBG2011] 10 * 18 48 53.42 -01 29 49.2           ~ 1 0
62 HD 179029 * 19 12 34.5418184664 -37 31 26.533823016   7.22 7.15     B5V 23 0

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