Sleuthing Red Giants in Globular Clusters
- Andrea Dupree, Harvard-Smithsonian Center for Astrophysics
Thursday, February 7, 4:10 PM - Physics and Astronomy Colloquium
Biomedical & Physical Sciences Bldg., Rm. 1415
Near-ir spectroscopy of red giants addresses several perplexing problems of globular clusters. The discovery of fast winds from these stars can explain the missing intracluster material. These winds may account for observations of slowly rotating red horizontal branch stars. And the presence of absorption by neutral helium offers insight into the second generation of stars and the conjectured helium enhancement in many globular clusters.