Valentina D'Orazi (Macquarie University)
"Understanding the internal pollution mechanisms in globular clusters: clues from light- and heavy-element abundances"
Abstract. The traditional perspective of globular clusters as simple stellar populations is now overcome. In the last years a huge number of observational studies have revealed the presence of significant internal variations in the light elements, such as C, O, N, Na, Mg, and Al. This extremely peculiar chemical pattern, which is not observed in open clusters and field stars, points to inter-cluster pollution processes and to the existence of multiple stellar generations. In this talk I will review the results from a large high-resolution spectroscopic survey, carried out from our group in the last five years, focused on light (e.g., Li and F) and heavy element (s-process elements) abundance determination. The comparison with theoretical models and the general implications on cluster formation and early evolution scenarios will be also discussed.
Held in the AAO Meeting Room (Room 7, 1st Floor, Building 2) at 11:00 AM on Thursday, 25 July 2013back