Physics & Astronomy - Astronomy Seminar - Dr. Paolo Ventura, INAF

Title: "Multiple Populations in Globular Clusters: The Role of Massive AGB Stars"

July 24, 2017
3 am - 4 pm
Location
Wilder 202
Sponsored by
Physics & Astronomy Department
Audience
Public
More information
Tressena Manning
603-646-2854

Abstract: Photometric and high-resolution spectroscopy observations run in the last decades have put serious challenges to the paradigma that Globular Clusters (GC) can be considered as simple stellar populations, i.e. made up of stars born at the same time and with the same chemical composition. Almost all the GCs in the Galaxy harbour at least two stellar populations: a dominant component, with the pristine chemical composition, and and an additional group of stars, formed from material that was exposed to proton-capture nucleosynthesis. Among the various class of stars that might have contaminated the intra-cluster medium, from which the stars with the "anomalous" chemistry formed, we focus on the possibility that pollution was mainly determined by the gas ejected by stars of mass above 4Msun, evolving through the Asymptotic Giant Branch.

Location
Wilder 202
Sponsored by
Physics & Astronomy Department
Audience
Public
More information
Tressena Manning
603-646-2854