Kenji Bekki (University Western Australia)

Formation of globular clusters with multiple stellar populations
When Sep 02, 2016 from 11:00 AM to 12:00 PM
What
  • Colloquium
Where SH Lecture Hall
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Globular clusters (GCs) have long been considered to be single stellar populations (SSPs) - collections of coeval and chemically homogeneous stars. Recent photometric and spectroscopic observations, however, have revealed that most of the Galactic  GCs contain at least two different stellar populations with difference chemical abundances, and possibly, different ages. I will discuss the following three topics related to this recent discovery of multiple stellar populations of GCs. First,  I will show our new observational results on the presence of multiple-generation of stars in star clusters of the Large Magellanic Cloud. Second, I will show the results of numerical simulations on the two-stage formation process of GCs in gas-rich dwarf disk galaxies. Third, I will discuss how the `anomalous GCs' with metallicity spreads can be formed within  their host galaxies  using our latest simulations of GC merging.