2010ApJ...717..277M

Query : 2010ApJ...717..277M

2010ApJ...717..277M - Astrophys. J., 717, 277-288 (2010/July-1)

Chemical composition of the old globular clusters NGC 1786, NGC 2210, and NGC 2257 in the Large Magellanic Cloud.

MUCCIARELLI A., ORIGLIA L. and FERRARO F.R.

Abstract (from CDS):

This paper presents the chemical abundance analysis of a sample of 18 giant stars in three old globular clusters in the Large Magellanic Cloud (LMC), NGC 1786, NGC 2210, and NGC 2257. The derived iron content is [Fe/H] = -1.75±0.01 dex (σ = 0.02 dex), -1.65±0.02 dex (σ = 0.04 dex), and -1.95±0.02 dex (σ = 0.04 dex) for NGC 1786, NGC 2210, and NGC 2257, respectively. All the clusters exhibit similar abundance ratios, with enhanced values (~+0.30 dex) of [α/Fe], consistent with the Galactic halo stars, thus indicating that these clusters have formed from a gas enriched by Type II supernovae. We also found evidence that r-process is the main channel of production of the measured neutron capture elements (Y, Ba, La, Nd, Ce, and Eu). In particular, the quite large enhancement of [Eu/Fe] (~+0.70 dex) found in these old clusters clearly indicates a relevant efficiency of the r-process mechanism in the LMC environment.

Abstract Copyright: ∼

Journal keyword(s): globular clusters: general - Magellanic Clouds - stars: abundances - techniques: spectroscopic

VizieR on-line data: <Available at CDS (J/ApJ/717/277): table1.dat table2.dat table3.dat table4.dat table5.dat>

Simbad objects: 56

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Number of rows : 56
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 ESO 349-31 AG? 00 08 13.1536 -34 34 47.836   15.54   14.99   ~ 156 3
2 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
3 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
4 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
5 NGC 1651 GlC 04 37 32.530 -70 35 08.71   12.99 12.28     ~ 125 0
6 H88 11 Cl* 04 52 20 -68 59.5           ~ 17 0
7 OGLE LMC-LPV-9759 LP* 04 58 59.8579919424 -67 45 05.257942920     16.800 15.78 15.124 ~ 6 0
8 OGLE LMC-LPV-9787 RG* 04 59 01.3594392360 -67 44 07.283847624     16.790   15.462 ~ 4 0
9 OGLE LMC-LPV-9801 LP* 04 59 02.1507131856 -67 44 35.822492160       15.42 14.829 ~ 7 0
10 OGLE LMC-LPV-9817 RG* 04 59 03.3501156864 -67 45 16.714052424     16.489   15.026 ~ 5 0
11 [MOF2009] NGC 1786 1248 RG* 04 59 04.52 -67 44 27.1           ~ 2 0
12 NGC 1786 Cl* 04 59 07.470 -67 44 45.44   10.1       ~ 152 0
13 NGC 1783 GlC 04 59 08.590 -65 59 15.84   10.9 10.93     ~ 273 0
14 OGLE LMC-LPV-9891 RG* 04 59 09.1140833112 -67 43 42.718299924     16.726   15.360 ~ 4 0
15 OGLE LMC-LPV-10010 LP* 04 59 17.1955232184 -67 44 19.517463024     16.486 15.56 15.035 ~ 5 0
16 NGC 1898 As* 05 16 45.380 -69 39 16.76   12.62 11.86     ~ 104 0
17 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
18 NGC 1978 GlC 05 28 45.330 -66 14 12.04   10.7 10.70     ~ 317 0
19 NGC 2005 Cl* 05 30 08.500 -69 45 14.42   12.30 11.57     ~ 103 0
20 NGC 2019 Cl* 05 31 56.48 -70 09 32.5   10.9 10.86     ~ 124 0
21 NGC 2173 GlC 05 57 58 -72 58.7   12.74 11.88     ~ 148 0
22 OGLE LMC-LPV-91403 RG* 06 11 25.8149339352 -69 07 36.394900968     16.142 15.89 14.736 ~ 4 0
23 OGLE LMC-LPV-91413 LP* 06 11 30.1628973648 -69 06 49.498768800     16.076   14.669 ~ 5 0
24 NGC 2210 GlC 06 11 31.296 -69 07 17.04   10.9 10.94     ~ 196 0
25 OGLE LMC-RRLYR-24719 RR* 06 11 33.14 -69 06 48.9         19.350 ~ 5 0
26 2MASS J06113663-6906466 RG* 06 11 36.6303281808 -69 06 46.725891156           ~ 3 0
27 Cl* NGC 2210 ABW 7 RG* 06 11 45.3460178976 -69 06 44.256301776   17.47 16.32 15.99   ~ 4 0
28 2MASS J06295653-6419027 RG* 06 29 56.5301279544 -64 19 02.756882352           ~ 2 0
29 2MASS J06300777-6418465 RG* 06 30 07.77 -64 18 46.5           ~ 3 0
30 NGC 2257 Cl* 06 30 12.62 -64 19 40.0   13.24 12.62     ~ 228 0
31 Cl* NGC 2257 W 81 * 06 30 14.1869701752 -64 20 22.178393628           ~ 4 0
32 Cl* NGC 2257 GCS 13 * 06 30 14.78 -64 18 57.6           ~ 3 0
33 Cl* NGC 2257 W 223 * 06 30 17.7983349960 -64 19 47.775906588           ~ 4 0
34 Cl* NGC 2257 W 293 * 06 30 19.7695676904 -64 19 34.637405664           ~ 4 0
35 ESO 206-20A G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1190 0
36 NGC 2808 GlC 09 12 03.10 -64 51 48.6           ~ 1540 0
37 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
38 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
39 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2593 0
40 * 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
41 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
42 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 2095 0
43 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1978 0
44 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2291 0
45 M 10 GlC 16 57 09.05 -04 06 01.1     4.98     ~ 857 0
46 NGC 6287 GlC 17 05 09.4906767360 -22 42 28.099250172   11.49 10.30     ~ 240 0
47 NGC 6293 GlC 17 10 10.42 -26 34 54.2           ~ 309 0
48 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
49 NGC 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 2103 0
50 NGC 6541 GlC 18 08 02.36 -43 42 53.6           ~ 409 0
51 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
52 NGC 6752 GlC 19 10 52.11 -59 59 04.4           ~ 2121 0
53 M 71 GlC 19 53 46.49 +18 46 45.1           ~ 1190 0
54 * phi Cap * 21 15 37.8995516616 -20 39 06.102756432   6.317 5.152     K0II/III 46 0
55 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3274 0
56 NAME Local Group GrG ~ ~           ~ 9325 0

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