1999AJ....117.2286G

Query : 1999AJ....117.2286G

1999AJ....117.2286G - Astron. J., 117, 2286-2295 (1999/May-0)

Elemental abundances in evolved supergiants. I. NGC 330, a young SMC cluster.

GONZALEZ G. and WALLERSTEIN G.

Abstract (from CDS):

We report on the results of our analyses of high-quality spectroscopic observations of seven giants in NGC 330. The mean value of [Fe/H] for the cluster is -0.94±0.02 (σ=0.04). This is consistent with the results of Spite et al. and slightly less than those of the recent study of V. Hill.

We see evidence of the products of CNO cycling. The average ratio of 12C/13C is near 8, which is about half of the value predicted by the models of Schaller et al., but we do not detect the predicted enhancement of 0.3-0.6 dex in the N abundance. We find no excess of O relative to Fe despite the stars' low metallicities. Our analysis of the heavy elements from Zr to Eu indicates that the ratio of r/s processes is greater in NGC 330 than in the Sun.


Abstract Copyright: ∼

Journal keyword(s): Stars: Abundances - Stars: AGB and Post-AGB - Stars: Chemically Peculiar

Simbad objects: 12

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Number of rows : 12
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 Cl* NGC 330 ARP 3 * 00 56 09.4059802800 -72 27 58.864347972 13.33 14.09 14.22 14.568 14.36 B1II 29 0
3 Cl* NGC 330 ARP 45 s*b 00 56 10.0781111880 -72 27 32.553003924 13.2 14.15 14.29   14.444 B2IIe 26 0
4 Cl* NGC 330 ARP 42 s*r 00 56 12.8588237208 -72 27 46.611474408 16.69 15.39 14.02   12.74 K1Ib 23 1
5 Cl* NGC 330 ARP 43 s*r 00 56 13.8925979832 -72 27 32.381413632   13.88 13.14   11.95 K1Iab 23 0
6 Cl* NGC 330 ARP 41 s*y 00 56 14.5589672736 -72 27 42.429585492   14.514 12.96     G6Ib 34 0
7 NGC 330 Cl* 00 56 18.55 -72 27 45.1 9.37 9.76 9.55   8.89 ~ 445 0
8 Cl* NGC 330 ARP 17 s*y 00 56 19.0345026552 -72 28 08.217421572   15.05 13.52     G8.5Iab-Ib 28 0
9 Cl* NGC 330 ARP 26 s*y 00 56 21.6971276352 -72 27 35.839505124   14.82 13.81     G3Ib 24 0
10 Cl* NGC 330 ARP 10 s*y 00 56 25.3272991080 -72 28 18.180373908 14.67 14.49 13.26   11.85 G7Iab/Ib 34 0
11 Cl* NGC 330 ARP 12 s*y 00 56 27.3328012560 -72 28 06.441607488 16.52 15.40 13.93   12.73 G8Ib/II 20 0
12 * 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

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