Anticorrelation of cyanogen and CH on the giant branches of 47 Tucanae
Journal Article
·
· Astrophys. J.; (United States)
We present CN and G band measurements for 112 stars on the red giant and asymptotic giant branches of 47 Tucanae. The data support the hypothesis (at the 2 x 10/sup -5/ significance level) that there is an anticorrelation between CN and CH on the red giant branch (RGB) as has been previously reported for the horizontal-branch stars in this cluster. There seems little need to invoke the occurrence of mixing phenomena during the transition of a star from M/sub ..nu../approx.0.0 on the RGB to the horizontal branch and later evolutionary phases, as has been suggested for the more metal-poor clusters such as M92. We also highlight the finding of Bell, Hesser, and Cannon that there appears to be an anticorrelation of CN and CH in their best observed CN-strong, CN-weak pair of stars at the turnoff of this cluster.
- Research Organization:
- Mount Stromlo and Siding Spring Observatories, Research School of Physical Sciences, Australian National University
- OSTI ID:
- 6978348
- Journal Information:
- Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 277:2; ISSN ASJOA
- Country of Publication:
- United States
- Language:
- English
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