2002ApJ...568L..23G

Using current observational data and simple dynamical modeling, we demonstrate that ω Cen is not special among the Galactic globular clusters in its ability to produce and retain the heavy elements dispersed in the asymptotic giant branch phase of stellar evolution. The multiple stellar populations observed in ω Cen cannot be explained if it had formed as an isolated star cluster. The formation within a progenitor galaxy of the Milky Way is more likely, although the unique properties of ω Cen still remain a mystery.