Two kinematically distinct old globular cluster populations in the Large
  Magellanic Cloud
  We report results of proper motions of 15 known Large Magellanic Cloud (LMC)
old globular clusters (GCs) derived from the Gaia DR2 data sets. When these
mean proper motions are gathered with existent radial velocity measurements to
compose the GCs' velocity vectors, we found that the projection of the velocity
vectors onto the LMC plane and those perpendicular to it tell us about two
distinct kinematic GC populations. Such a distinction becomes clear if the GCs
are split at a perpendicular velocity of 10 km/s (absolute value). The two
different kinematic groups also exhibit different spatial distributions. Those
with smaller vertical velocities are part of the LMC disc, while those with
larger values are closely distributed like a spherical component. Since GCs in
both kinematic-structural components share similar ages and metallicities, we
speculate with the possibility that their origins could have occurred through a
fast collapse that formed halo and disc concurrently.
