The Dwarf galaxy - Ultra Compact Dwarf - Globular Cluster connection.

We report recent results using the Keck telescope to obtain the
internal kinematics for a sample of the lowest mass dwarf
elliptical (dE) galaxies to date. We measure central, and in some
cases, extended velocity dispersion profiles. From this data, and
others in the literature, we explore the scaling relations of
higher mass dEs, dSph, and UCDs/GCs - in particular bridging the
gap in mass that previously existed between these dwarf types. 
We discuss the implications for dark matter in these
objects. These results have bearing on the differences between 
small galaxies and star clusters and ultimately the fundamental
question of `what is a galaxy?'.