Origin of Extended Star Clusters
  We have discovered new extended star clusters (ESCs) in a nearby dIrr galaxy
NGC 6822. These clusters are the nearest sample of ESCs available to date. The
key characteristic of ESCs is their large size compared to typical globular
clusters even though the two cluster populations are rather similar in terms of
other parameters, i.e., color and luminosity. Several scenarios have been
suggested to explain the formation of ESCs. However, the currently known ESCs
may be a mixture of populations with heterogeneous formation histories. Future
observational and theoretical studies are expected to better constrain the
origins of ESCs as well as to increase their sample size.
