Fluorine Abundances of AGB Stars in Stellar Clusters

Autor(en)

Andreas Hren, Thomas Lebzelter, Bernhard Aringer, Kenneth H. Hinkle, Walter Nowotny-Schipper

Abstrakt

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.

Organisation(en)

Institut für Astrophysik

Externe Organisation(en)

INAF - Osservatorio Astronomico di Padova, National Optical Astronomy Observatory, Tucson

Seiten

305-306

Publikationsdatum

08-2015

ÖFOS 2012

103003 Astronomie, 103004 Astrophysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/fluorine-abundances-of-agb-stars-in-stellar-clusters(51577235-d4c7-445d-b494-e03d267dbdcc).html