Author:
Lebzelter Thomas,Lederer Michael T.,Cristallo Sergio,Straniero Oscar,Hinkle Kenneth H.
Abstract
AbstractLMC clusters offer an outstanding opportunity to investigate the late stages of stellar evolution of stars in the mass range between 1.5 and 2 M⊙. 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.
Publisher
Cambridge University Press (CUP)
Subject
Astronomy and Astrophysics,Space and Planetary Science