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2012MNRAS.427.1153S - Mon. Not. R. Astron. Soc., 427, 1153-1167 (2012/December-1)
Spectral matching for abundances and clustering analysis of stars on the giant branches of ω Centauri.
SIMPSON J.D., COTTRELL P.L. and WORLEY C.C.
Abstract (from CDS):
These stars show the expected anticorrelation between [C/Fe] and [N/Fe]. We investigated the distribution of CN-weak/CN-strong stars on the colour–magnitude diagram. Asymptotic giant branch stars, which were selected from their position on the colour–magnitude diagram, were almost all CN weak. This is in contrast to the red giant branch where a large minority were CN strong. The results were also compared with cluster formation and evolution models. Overall, this study shows that statistically significant elemental and evolutionary conclusions can be obtained from lower resolution spectroscopy.
Abstract Copyright: © 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS
Journal keyword(s): stars: abundances - stars: AGB and post-AGB - globular clusters: individual: ω Centauri (NGC 5139)
VizieR on-line data: <Available at CDS (J/MNRAS/427/1153): table2.dat table4.dat>
Simbad objects: 227
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