2008AJ....136..375M

Query : 2008AJ....136..375M

2008AJ....136..375M - Astron. J., 136, 375-388 (2008/July-0)

The chemical composition of red giant stars in four intermediate-age clusters of the Large Magellanic Cloud.

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

Abstract (from CDS):

This paper presents the chemical abundance analysis of a sample of 27 red giant stars located in four populous intermediate-age globular clusters in the Large Magellanic Cloud, namely NGC 1651, 1783, 1978, and 2173. This analysis is based on high-resolution (R∼ 47,000) spectra obtained with the UVES@VLT spectrograph. For each cluster we derived up to 20 abundance ratios sampling the main chemical elemental groups, namely light odd-Z, α, iron-peak, and neutron-capture elements. All the analyzed abundance patterns behave similarly in the four clusters and also show negligible star-to-star scatter within each cluster. We find [Fe/H] = -0.30±0.03, -0.35±0.02, -0.38±0.02, and -0.51±0.03 dex for NGC 1651, 1783, 1978, and 2173, respectively. The measurement of light odd-Z nuclei gives slightly subsolar [Na/Fe] and a more significant [Al/Fe] depletion (~-0.50 dex). The [α/Fe] abundance ratios are nearly solar, while the iron-peak elements well trace those of the iron. S-process elements behave in a peculiar way: light s-elements give subsolar [Y/Fe] and [Zr/Fe] abundance ratios, while heavy s-elements give enhanced [Ba/Fe], [La/Fe], and [Nd/Fe] with respect to the solar values. Also, the [Eu/Fe] abundance ratio turns out to be enhanced (∼0.4 dex).

Abstract Copyright: ∼

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

VizieR on-line data: <Available at CDS (J/AJ/136/375): table1.dat table2.dat table4.dat tab5-9.dat>

Nomenclature: [MCO2008] NGC 1651 NNN (Nos 1-678). [MCO2008] NGC 1783 NNNN (Nos 1-1904). [MCO2008] NGC 1978 NNNN (Nos 1-2682). [MCO2008] NGC 2173 NNN (Nos 1-680).

Simbad objects: 48

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Number of rows : 48
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 SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
2 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
3 2MASS J04372575-7034259 RG* 04 37 25.7668668912 -70 34 25.978011636           ~ 1 0
4 OGLE LMC-LPV-779 RG* 04 37 31.2007347984 -70 34 24.330943956     16.720   15.011 ~ 3 0
5 2MASS J04373180-7035454 RG* 04 37 31.8022398504 -70 35 45.548499444           ~ 1 0
6 2MASS J04373227-7035017 RG* 04 37 32.2833944232 -70 35 01.777170156           ~ 1 0
7 NGC 1651 GlC 04 37 32.530 -70 35 08.71   12.99 12.28     ~ 125 0
8 OGLE LMC-LPV-786 LP* 04 37 33.1298300688 -70 36 04.555629036     16.698   14.886 ~ 2 0
9 2MASS J04585437-6558201 RG* 04 58 54.3637890432 -65 58 20.254015092   17.99 15.98     ~ 5 0
10 2MASS J04590497-6558477 RG* 04 59 04.9709004336 -65 58 47.658949248           ~ 1 0
11 [MCO2008] NGC1783-23 RG* 04 59 07.0350 -65 59 10.436           ~ 1 0
12 2MASS J04590791-6559446 RG* 04 59 07.913 -65 59 44.67           ~ 2 0
13 NGC 1783 GlC 04 59 08.590 -65 59 15.84   10.9 10.93     ~ 273 0
14 2MASS J04591224-6557464 RG* 04 59 12.2317846440 -65 57 46.430548452           ~ 1 0
15 [MCO2008] NGC1783-33 RG* 04 59 12.2800 -65 59 26.412           ~ 1 0
16 NGC 1818 GlC 05 04 13.300 -66 26 05.47           ~ 279 0
17 NGC 1866 GlC 05 13 38.920 -65 27 52.75           ~ 437 0
18 NGC 1898 As* 05 16 45.380 -69 39 16.76   12.62 11.86     ~ 104 0
19 NAME LMC Bar PoG 05 22 08 -69 23.5           ~ 343 0
20 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
21 2MASS J05283634-6613559 RG* 05 28 36.3511781712 -66 13 55.910827524   18.648 16.966     ~ 2 0
22 2MASS J05284095-6614461 RG* 05 28 40.9596665808 -66 14 46.081178304   18.784 17.210     ~ 2 0
23 2MASS J05284200-6613573 RG* 05 28 42.0182280912 -66 13 57.259760196   18.714   15.70   ~ 3 0
24 Cl* NGC 1978 WBT 749 RG* 05 28 42.3540 -66 14 06.623   19.064 17.205     ~ 2 0
25 2MASS J05284256-6612285 RG* 05 28 42.5737557816 -66 12 28.536599268   18.723 17.073     ~ 4 0
26 NGC 1978 GlC 05 28 45.330 -66 14 12.04   10.7 10.70     ~ 317 0
27 Cl* NGC 1978 WBT 739 RG* 05 28 45.7488 -66 14 31.376   18.9 17.128     ~ 2 0
28 2MASS J05284595-6614194 RG* 05 28 45.960 -66 14 19.43   18.776   15.44   KIII 4 0
29 2MASS J05284834-6614020 RG* 05 28 48.344 -66 14 02.08   18.317   15.28   ~ 3 0
30 Cl* NGC 1978 WBT 747 RG* 05 28 49.0061919312 -66 13 39.863466156   18.826 17.184     ~ 2 0
31 Cl* NGC 1978 WBT 732 RG* 05 28 50.2344175128 -66 15 24.484439988   18.727 16.962     ~ 4 0
32 RHV 0528502-661626 RG* 05 28 53.318 -66 14 06.75   18.764 17.160     ~ 6 0
33 NGC 2005 Cl* 05 30 08.500 -69 45 14.42   12.30 11.57     ~ 103 0
34 NGC 2004 Cl* 05 30 41.340 -67 17 21.83   9.6       ~ 281 0
35 NGC 2019 Cl* 05 31 56.48 -70 09 32.5   10.9 10.86     ~ 124 0
36 2MASS J05575558-7258534 RG* 05 57 55.58 -72 58 53.4           ~ 2 0
37 2MASS J05575667-7258299 RG* 05 57 56.6798605128 -72 58 29.900042148           ~ 3 0
38 2MASS J05575784-7257548 RG* 05 57 57.8443004424 -72 57 54.909572868           ~ 4 0
39 NGC 2173 GlC 05 57 58 -72 58.7   12.74 11.88     ~ 148 0
40 2MASS J05575891-7258426 RG* 05 57 58.920 -72 58 42.66           ~ 1 0
41 2MASS J05581142-7258328 LP* 05 58 11.4226254888 -72 58 32.892090528           ~ 7 0
42 ESO 121-3 Cl* 06 02 03.32 -60 31 25.6   14.91 14.04     ~ 118 0
43 NGC 2203 Cl* 06 04 42.17 -75 26 15.8   12.80 11.29     ~ 54 0
44 NGC 2210 GlC 06 11 31.296 -69 07 17.04   10.9 10.94     ~ 196 0
45 NAME Hodge 11 GlC 06 14 22.92 -69 50 54.9   12.57 11.93     ~ 117 0
46 NGC 6338 Bla 17 15 22.9842192344 +57 24 40.346559927   14.2   8   ~ 205 2
47 NGC 6441 GlC 17 50 13.06 -37 03 05.2           ~ 940 0
48 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2

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