期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 431, 期 4, 页码 3338-3348出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stt412
关键词
Galaxy: abundances; open clusters and associations: individual: NGC 2527, NGC 2682, NGC 2482, NGC 2539, NGC 2335, NGC 2251, NGC 2266; stars: abundances
资金
- Robert A. Welch Foundation of Houston, Texas [F-634]
- National Aeronautics and Space Administration (NASA)
- National Science Foundation (NSF)
We have analysed high-resolution echelle spectra of red giant members for seven open clusters in the Galactic anticentre direction to explore their chemical compositions. Cluster membership has been confirmed by radial velocity. The spread in temperatures and gravities being very small among the red giants, nearly the same stellar lines were employed for all stars thereby reducing the abundance errors: the errors of the average abundance for a cluster were generally in the 0.02-0.05 dex range. Our present sample covers Galactocentric distances of 8.3-11.3 kpc and an age range of 0.2-4.3 Gyr. A careful comparison of our results for the cluster NGC 2682 (M67) to other high-resolution abundance studies in the literature shows general good agreement for almost all elements in common.
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