2009AJ....138..517P

Query : 2009AJ....138..517P

2009AJ....138..517P - Astron. J., 138, 517-532 (2009/August-0)

Ca II triplet spectroscopy of Small Magellanic Cloud red giants. I. Abundances and velocities for a sample of clusters.

PARISI M.C., GROCHOLSKI A.J., GEISLER D., SARAJEDINI A. and CLARIA J.J.

Abstract (from CDS):

We have obtained near-infrared spectra covering the Ca II triplet lines for a large number of stars associated with 16 Small Magellanic Cloud (SMC) clusters using the VLT + FORS2. These data compose the largest available sample of SMC clusters with spectroscopically derived abundances and velocities. Our clusters span a wide range of ages and provide good areal coverage of the galaxy. Cluster members are selected using a combination of their positions relative to the cluster center as well as their location in the color-magnitude diagram, abundances, and radial velocities (RVs). We determine mean cluster velocities to typically 2.7 km/s and metallicities to 0.05 dex (random errors), from an average of 6.4 members per cluster. By combining our clusters with previously published results, we compile a sample of 25 clusters on a homogeneous metallicity scale and with relatively small metallicity errors, and thereby investigate the metallicity distribution, metallicity gradient, and age-metallicity relation (AMR) of the SMC cluster system. For all 25 clusters in our expanded sample, the mean metallicity [Fe/H] = -0.96 with σ = 0.19. The metallicity distribution may possibly be bimodal, with peaks at ~-0.9 dex and -1.15 dex. Similar to the Large Magellanic Cloud (LMC), the SMC cluster system gives no indication of a radial metallicity gradient. However, intermediate age SMC clusters are both significantly more metal-poor and have a larger metallicity spread than their LMC counterparts. Our AMR shows evidence for three phases: a very early (>11 Gyr) phase in which the metallicity reached ~-1.2 dex, a long intermediate phase from ∼10 to 3 Gyr in which the metallicity only slightly increased, and a final phase from 3 to 1 Gyr ago in which the rate of enrichment was substantially faster. We find good overall agreement with the model of Pagel & Tautvaišiene, which assumes a burst of star formation at 4 Gyr. Finally, we find that the mean RV of the cluster system is 148 km/s, with a velocity dispersion of 23.6 km/s and no obvious signs of rotation amongst the clusters. Our result is similar to what has been found from a wide variety of kinematic tracers in the SMC, and shows that the SMC is best represented as a pressure supported system.

Abstract Copyright: ∼

Journal keyword(s): galaxies: star clusters - Magellanic Clouds - stars: abundances

VizieR on-line data: <Available at CDS (J/AJ/138/517): table1.dat table2.dat>

Nomenclature: Table 2: [PGG2009] BS121 NN N=5 among (Nos 2-12), [PGG2009] HWNN NN N=12, [PGG2009] LNNN NN N=85.

CDS comments: In paragraph 4 Cl Melotte 67 not identified.

Simbad objects: 137

goto Full paper

goto View the references in ADS

Number of rows : 137
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 [PGG2009] L4 14 RG* 00 21 14.38 -73 44 17.7           ~ 1 0
2 [PGG2009] L4 17 RG* 00 21 18.17 -73 43 40.2           ~ 1 0
3 [PGG2009] L4 9 RG* 00 21 23.0098284144 -73 45 10.288722636           ~ 2 0
4 [PGG2009] L4 6 RG* 00 21 25.66 -73 45 45.9           ~ 1 0
5 [PGG2009] L4 12 RG* 00 21 25.88 -73 44 38.7           ~ 1 0
6 ESO 28-15 OpC 00 21 27 -73 44.9   13.9       ~ 35 0
7 [PGG2009] L4 7 RG* 00 21 27.74 -73 45 32.1           ~ 1 0
8 [PGG2009] L4 4 RG* 00 21 28.11 -73 46 13.2           ~ 1 0
9 [PGG2009] L4 11 RG* 00 21 30.22 -73 44 46.9           ~ 1 0
10 [PGG2009] L4 10 RG* 00 21 31.63 -73 44 56.1           ~ 1 0
11 [PGG2009] L5 8 RG* 00 22 39.82 -75 04 31.4           ~ 1 0
12 ESO 28-16 Cl* 00 22 40 -75 04.5   15.7       ~ 30 0
13 [PGG2009] L5 5 RG* 00 22 40.12 -75 05 00.4           ~ 1 0
14 [PGG2009] L5 6 RG* 00 22 42.63 -75 04 53.2           ~ 1 0
15 [PGG2009] L5 7 RG* 00 22 43.04 -75 04 40.3           ~ 1 0
16 [PGG2009] L5 10 RG* 00 22 46.27 -75 04 05.9           ~ 1 0
17 [PGG2009] L6 17 RG* 00 22 54.73 -73 39 18.5           ~ 1 0
18 [PGG2009] L6 7 RG* 00 22 56.72 -73 40 51.7           ~ 1 0
19 [PGG2009] L6 9 RG* 00 23 00.75 -73 40 34.6           ~ 1 0
20 [PGG2009] L6 11 RG* 00 23 01.99 -73 40 14.7           ~ 1 0
21 ESO 28-17 OpC 00 23 04 -73 40.2   15.3       ~ 32 0
22 [PGG2009] L6 12 RG* 00 23 06.77 -73 40 06.0           ~ 1 0
23 [PGG2009] L6 6 RG* 00 23 12.79 -73 41 02.2           ~ 1 0
24 [PGG2009] L6 16 RG* 00 23 14.54 -73 39 27.8           ~ 1 0
25 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
26 [PGG2009] L7 10 RG* 00 24 35.40 -73 45 29.2           ~ 1 0
27 [PGG2009] L7 13 RG* 00 24 41.00 -73 45 03.0           ~ 1 0
28 Cl Lindsay 7 Cl* 00 24 43.16 -73 45 11.7   13.2       ~ 39 0
29 [PGG2009] L7 9 RG* 00 24 43.36 -73 45 40.0           ~ 1 0
30 [PGG2009] L7 11 RG* 00 24 43.48 -73 45 20.2           ~ 1 0
31 [PGG2009] L7 8 RG* 00 24 45.1378255920 -73 45 47.572317720           ~ 2 0
32 [PGG2009] L7 12 RG* 00 24 46.62 -73 45 11.9           ~ 1 0
33 [PGG2009] L7 14 RG* 00 24 48.68 -73 44 54.9           ~ 1 0
34 NGC 121 GlC 00 26 49.0 -71 32 10   11.2 11.24     ~ 330 0
35 [PGG2009] L17 16 RG* 00 35 35.11 -73 35 00.1           ~ 1 0
36 [PGG2009] L17 12 RG* 00 35 37.222 -73 35 43.71   19.48 18.15   17.07 ~ 2 0
37 [PGG2009] L17 10 RG* 00 35 39.82 -73 35 58.6           ~ 1 0
38 [PGG2009] L17 9 RG* 00 35 41.6555288208 -73 36 10.006610184   18.83 17.56   16.47 ~ 2 0
39 Cl Lindsay 17 OpC 00 35 41.70 -73 35 51.4 14.27 14.13 13.35   12.45 ~ 28 0
40 [PGG2009] L17 8 RG* 00 35 42.3789871944 -73 36 18.847575936   18.93 17.68   16.53 ~ 2 0
41 [PGG2009] L17 7 RG* 00 35 44.87 -73 36 31.4           ~ 1 0
42 [PGG2009] L17 13 RG* 00 35 50.0410309632 -73 35 33.719533656 20.20 19.14 17.96   16.70 ~ 2 0
43 [PGG2009] L17 15 RG* 00 35 51.311 -73 35 11.32   19.08 18.01   16.83 ~ 2 0
44 [PGG2009] L19 13 RG* 00 37 34.19 -73 54 04.2           ~ 1 0
45 [PGG2009] L19 7 RG* 00 37 34.97 -73 55 03.1           ~ 1 0
46 [PGG2009] L19 14 RG* 00 37 36.69 -73 53 54.7           ~ 1 0
47 [PGG2009] L19 6 RG* 00 37 41.56 -73 55 11.4           ~ 1 0
48 Cl Lindsay 19 Cl* 00 37 41.78 -73 54 19.7 13.70 14.78 13.18   12.17 ~ 36 0
49 [PGG2009] L19 11 RG* 00 37 42.976 -73 54 21.51 19.61 18.53 17.29   16.07 ~ 2 0
50 [PGG2009] L19 8 RG* 00 37 43.0441633440 -73 54 54.558578376 19.85 18.41 17.26   16.03 ~ 2 0
51 [PGG2009] L19 16 RG* 00 37 45.1409508384 -73 53 37.012840296 19.81 19.09 17.98   16.93 ~ 2 0
52 [PGG2009] L27 9 RG* 00 41 12.216 -72 53 46.46 19.46 18.80 17.75   16.72 ~ 2 0
53 [PGG2009] L27 17 RG* 00 41 21.84 -72 52 41.4           ~ 1 0
54 Cl Lindsay 27 Cl* 00 41 23.83 -72 53 32.0 13.37 13.28 12.44   11.49 ~ 46 0
55 [PGG2009] L27 10 RG* 00 41 25.55 -72 53 37.5           ~ 1 0
56 [PGG2009] L27 19 RG* 00 41 25.9060983096 -72 52 19.358549760 19.37 18.60 17.42   16.29 ~ 2 0
57 [PGG2009] L27 12 RG* 00 41 27.1816349112 -72 53 21.348588912 18.78 18.48 17.46   16.47 ~ 2 0
58 [PGG2009] L27 8 RG* 00 41 28.47 -72 53 58.8           ~ 1 0
59 [PGG2009] L27 15 RG* 00 41 31.53 -72 53 01.8           ~ 1 0
60 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
61 NGC 330 Cl* 00 56 18.55 -72 27 45.1 9.37 9.76 9.55   8.89 ~ 445 0
62 NGC 339 OpC 00 57 47.62 -74 28 14.6 13.23 12.94 12.21   11.20 ~ 157 0
63 NGC 361 OpC 01 02 11.11 -71 36 25.3 12.86 12.43 11.77   10.70 ~ 105 0
64 [PGG2009] L72 6 RG* 01 03 49.7301886848 -72 48 48.850303032 19.96 19.20 18.09   17.07 ~ 2 0
65 NGC 376 Cl* 01 03 50.21 -72 49 33.5 10.83 11.16 10.90   10.17 ~ 57 0
66 [PGG2009] L72 13 RG* 01 03 52.97 -72 49 52.6           ~ 1 0
67 [PGG2009] L72 14 RG* 01 03 53.92 -72 50 03.7           ~ 1 0
68 [PGG2009] HW47 12 RG* 01 03 58.6130248200 -74 36 51.588283464 19.27 18.65 17.69   16.55 ~ 2 0
69 [PGG2009] L72 15 RG* 01 04 00.07 -72 49 44.1           ~ 1 0
70 [PGG2009] L72 18 RG* 01 04 02.96 -72 50 15.7           ~ 1 0
71 [PGG2009] HW47 8 RG* 01 04 05.07 -74 37 28.9           ~ 1 0
72 HW 47 Cl* 01 04 05.37 -74 37 06.1 16.68 16.13 15.25   13.95 ~ 26 0
73 [PGG2009] HW47 10 RG* 01 04 05.53 -74 37 12.3           ~ 1 0
74 [PGG2009] HW47 11 RG* 01 04 06.55 -74 37 00.8           ~ 1 0
75 [PGG2009] BS121 2 RG* 01 04 17.53 -72 50 20.0           ~ 1 0
76 [PGG2009] BS121 4 RG* 01 04 21.0164121024 -72 50 34.014316056 20.23 19.39 18.32   17.22 ~ 2 0
77 OGLE-CL SMC 237 Cl* 01 04 22.49 -72 50 51.9           ~ 27 0
78 [PGG2009] BS121 7 RG* 01 04 23.9172600552 -72 51 05.212131120 20.22 19.28 18.20   17.18 ~ 2 0
79 [PGG2009] BS121 5 RG* 01 04 25.85 -72 50 21.8           ~ 1 0
80 [PGG2009] BS121 12 RG* 01 04 32.46 -72 51 35.9           ~ 1 0
81 NAME SMC Bar PoG 01 05 -72.6           ~ 264 0
82 NGC 416 Cl* 01 07 59.03 -72 21 20.5 12.73 12.55 11.76   10.71 ~ 156 1
83 NGC 419 OpC 01 08 17.26 -72 53 01.8 11.41 11.16 10.50   9.34 ~ 287 0
84 [PGG2009] L106 11 RG* 01 30 26.07 -76 02 47.9           ~ 1 0
85 [PGG2009] L106 7 RG* 01 30 26.87 -76 03 34.1           ~ 1 0
86 [PGG2009] L106 10 RG* 01 30 29.61 -76 03 02.6           ~ 1 0
87 [PGG2009] L106 8 RG* 01 30 34.59 -76 03 21.9           ~ 1 0
88 [PGG2009] L106 12 RG* 01 30 36.06 -76 02 35.4           ~ 1 0
89 [PGG2009] L106 6 RG* 01 30 37.12 -76 03 44.7           ~ 1 0
90 ESO 29-44 Cl* 01 30 38 -76 03.3   16.4       ~ 28 0
91 [PGG2009] L106 13 RG* 01 30 41.67 -76 02 25.8           ~ 1 0
92 Cl Lindsay 108 Cl* 01 31 32 -71 57.2   14.8       ~ 27 0
93 [PGG2009] L108 12 RG* 01 31 33.02 -71 56 17.2           ~ 1 0
94 [PGG2009] L108 11 RG* 01 31 37.87 -71 56 26.0           ~ 1 0
95 [PGG2009] L108 8 RG* 01 31 38.43 -71 56 55.4           ~ 1 0
96 [PGG2009] L108 6 RG* 01 31 39.00 -71 57 15.8           ~ 1 0
97 [PGG2009] L108 10 RG* 01 31 42.28 -71 56 35.6           ~ 1 0
98 [PGG2009] L108 7 RG* 01 31 43.49 -71 57 04.1           ~ 1 0
99 [PGG2009] L110 16 RG* 01 34 21.77 -72 51 23.2           ~ 1 0
100 [PGG2009] L110 8 RG* 01 34 22.71 -72 52 50.8           ~ 1 0
101 [PGG2009] L110 10 RG* 01 34 24.16 -72 52 32.4           ~ 1 0
102 [PGG2009] L110 12 RG* 01 34 25.16 -72 52 12.4           ~ 1 0
103 [PGG2009] L110 4 RG* 01 34 25.88 -72 53 43.4           ~ 1 0
104 ESO 29-48 Cl* 01 34 26 -72 52.5   14.3       ~ 34 0
105 [PGG2009] L110 15 RG* 01 34 27.24 -72 51 31.8           ~ 1 0
106 [PGG2009] L110 13 RG* 01 34 31.30 -72 52 02.2           ~ 1 0
107 [PGG2009] L110 6 RG* 01 34 32.13 -72 53 15.5           ~ 1 0
108 [PGG2009] L110 14 RG* 01 34 35.0166955680 -72 51 49.098777300           ~ 2 0
109 [PGG2009] L111 14 RG* 01 34 54.49 -75 32 52.8           ~ 1 0
110 [PGG2009] L111 15 RG* 01 34 59.67 -75 32 43.6           ~ 1 0
111 NGC 643 Cl* 01 35 00.0 -75 33 24           ~ 33 1
112 [PGG2009] L111 8 RG* 01 35 00.56 -75 33 46.7           ~ 1 0
113 [PGG2009] L111 9 RG* 01 35 03.44 -75 33 37.1           ~ 1 0
114 [PGG2009] L111 16 RG* 01 35 06.43 -75 32 30.8           ~ 1 0
115 [PGG2009] L111 11 RG* 01 35 06.78 -75 33 18.7           ~ 1 0
116 [PGG2009] L111 5 RG* 01 35 08.22 -75 34 22.5           ~ 1 0
117 [PGG2009] L111 6 RG* 01 35 09.12 -75 34 14.0           ~ 1 0
118 [PGG2009] HW84 5 RG* 01 41 38.05 -71 10 07.2           ~ 1 0
119 [PGG2009] HW84 9 RG* 01 41 40.58 -71 09 24.2           ~ 1 0
120 [PGG2009] HW84 7 RG* 01 41 41.40 -71 09 46.9           ~ 1 0
121 HW 84 Cl* 01 41 43 -71 09.7           ~ 24 0
122 [PGG2009] HW84 8 RG* 01 41 47.95 -71 09 33.6           ~ 1 0
123 [PGG2009] HW86 10 RG* 01 42 18.62 -74 10 15.0           ~ 1 0
124 [PGG2009] HW86 8 RG* 01 42 19.12 -74 10 35.8           ~ 1 0
125 HW 86 Cl* 01 42 22 -74 10.4           ~ 26 0
126 [PGG2009] HW86 9 RG* 01 42 29.66 -74 10 25.3           ~ 1 0
127 [PGG2009] HW86 7 RG* 01 42 31.08 -74 10 46.7           ~ 1 0
128 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
129 NAME Magellanic Bridge HI 03 11 -77.5           ~ 522 1
130 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
131 M 79 GlC 05 24 10.59 -24 31 27.3     8.16     ~ 883 0
132 Cl Berkeley 20 OpC 05 32 36.8 +00 11 06           ~ 129 0
133 NGC 2298 GlC 06 48 59.41 -36 00 19.1     8.89     ~ 547 0
134 Cl Melotte 66 OpC 07 26 19.2 -47 41 14   8.73       ~ 213 0
135 Cl Berkeley 39 OpC 07 46 48.1 -04 39 59           ~ 209 1
136 M 68 GlC 12 39 27.98 -26 44 38.6     7.96     ~ 1069 0
137 NAME Local Group GrG ~ ~           ~ 9325 0

To bookmark this query, right click on this link: simbad:objects in 2009AJ....138..517P and select 'bookmark this link' or equivalent in the popup menu