A study of AGB stars in LMC clusters

Autor(en)

Thomas Lebzelter, Michael Lederer, Sergio Cristallo, Oscar Straniero, Kenneth H. Hinkle

Abstrakt

LMC clusters offer an outstanding opportunity to investigate the late stages of stellar evolution of stars in the mass range between 1.5 and 2 Mo.. In this presentation we will focus on our results on mixing events during the evolution along the Asymptotic Giant Branch (AGB). Surface abundances have been determined for a number of cluster AGB stars from high resolution near infrared spectra. We show for the first time the evolution of C/O and 12C/13C ratios along a cluster AGB. The change of both quantities due to dredge up events is compared with model predictions. Our results indicate the late occurrence of a moderate extra-mixing in some cases.

Organisation(en)

Institut für Astrophysik

Externe Organisation(en)

Osservatorio Astronomico di Collurania-Teramo, National Optical Astronomy Observatory, Tucson

Seiten

397-402

Anzahl der Seiten

6

DOI

https://doi.org/10.1017/S1743921308028767

Publikationsdatum

2008

ÖFOS 2012

103003 Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/fcea938a-b7a7-4296-8440-eff0a9bad3c5