Observations of multiple stellar populations in globular clusters

Details Observations of multiple stellar populations in globular clusters Observations of multiple stellar populations in globular clusters

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd..14e..10p&link_type=abstract

Modelling Dense Stellar Systems, 26th meeting of the IAU, Joint Discussion 14, 22-23 August 2006, Prague, Czech Republic, JD14,

Physics

Scientific paper

We will present a number of observational facts which point towards the presence of two (or more?) star formation episodes in globular clusters, with the second generation of stars formed from material polluted by the older stars. We will focus on recent photometric optical-UV HST investigations of a number of globular clusters characterized by anomalously blue horizontal branches. We will discuss on the possibility that the anomalous HBs can be an indirect evidence of multiple star formation. Additional spectroscopic evidence of self-enrichment in globular clusters will be presented. How polluting material from supernovae explosions, massive stars, and intermediate mass AGB stars can be retained within a globular cluster shall be matter of discussion for JD14.

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