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| Paper: |
Fluorine Abundances of AGB Stars in Stellar Clusters |
| Volume: |
497, Why Galaxies Care about AGB Stars III: A Closer Look in Space and Time |
| Page: |
305 |
| Authors: |
Hren, A.; Lebzelter, T.; Aringer, B.; Hinkle, K. H.; Nowotny, W. |
| Abstract: |
We have measured the abundance of fluorine, [F/Fe], in a number of AGB
stars in stellar clusters have correlated the results with their C/O
ratios. This allows us to investigate the change in the fluorine
abundance along the evolution on the giant branch. The target list
includes primarily O-rich stars in three LMC globular clusters –
NGC 1806, NGC 1846 and NGC 1978 – as well as Rup 106 and 47 Tuc
in our Galaxy. The observational data were obtained with the PHOENIX
spectrograph, and the COMA code was used for modelling the synthetic
spectra. Within individual clusters, we find consistent [F/Fe] values
at similar C/O for most of our target stars. |
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