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- W2017010499 abstract "Photometry and radial velocities confirming membership are given for additional stars in ω Cen, some of them belonging to the anomalous group lying to the red of the main giant branch in the IK, V−IK diagram first discussed by Lloyd Evans (1977, Paper V). The anomalous giant stars have strong CN bands as a rule. Their line spectra are generally similar to those of 47 Tuc stars of similar V−IK and differ from those on the main giant branch in that the strongest lines are stronger. This is consistent with the interpretation of Paper V, that they are of higher metal content than the cluster as a whole, but the interpretation is not unique. The λ4554 line of Ba II appears possibly enhanced in the anomalous stars, suggesting a connection with the stars on the main giant branch whose strong CN bands are attributed to mixing of reaction products to the surface. It seems likely that a range of metal abundance among the stars of ω Cen as well as mixing is required to account for all the peculiarities of the cluster." @default.
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- W2017010499 date "1977-12-01" @default.
- W2017010499 modified "2023-09-25" @default.
- W2017010499 title "Near infrared photometry of globular clusters - VIII. The anomalous giant branch of Centauri" @default.
- W2017010499 doi "https://doi.org/10.1093/mnras/181.3.591" @default.
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