Poster Abstracts

Name/Affiliation:  Arunas Kucinskas (Vilnius University, Lithuania)

Title:  Cool stars as tracers of multiple stellar populations in the Galactic globular cluster 47 Tuc

We use spectroscopic abundances of lithium, oxygen, and sodium in the main sequence turn-off (TO) stars to study the formation history of Galactic globular cluster 47 Tuc. Our data shows that this cluster consists of at least two stellar generations, each marked with its own distinct properties, and with the older having enriched the younger generation stars with light elements, such as sodium. We briefly discuss the implications of our findings in the context of possible formation scenarios of this and other Galactic globular clusters.