Classification of ultra-compact dwarfs and globular clusters

Determine whether ultra-compact dwarf galaxies and globular clusters should be classified as distinct classes of stellar systems, particularly when comparing intermediate-mass-black-hole candidates and high-velocity stellar populations between them.

Background

The paper compares its simulated high-velocity stars with observations of $\omega$ Centauri, whose classification lies near the boundary between globular clusters and ultra-compact dwarf galaxies. This ambiguity affects how directly the comparison can be used to assess the proposed accretion-disk growth mechanism.

A definitive classification would help determine whether the proposed mechanism applies across both classes of systems or specifically to ultra-compact dwarf galaxies.