The peculiar kinematics of the multiple populations in the globular
  cluster Messier 80 (NGC 6093)
  We combine MUSE spectroscopy and Hubble Space Telescope ultraviolet (UV)
photometry to perform a study of the chemistry and dynamics of the Galactic
globular cluster Messier 80 (M80, NGC 6093). Previous studies have revealed
three stellar populations that not only vary in their light-element abundances,
but also in their radial distributions, with concentration decreasing with
increasing nitrogen enrichment. This remarkable trend, which sets M80 apart
from the other Galactic globular clusters, points towards a complex formation
and evolutionary history. To better understand how M80 formed and evolved,
revealing its internal kinematics is key. We find that the most N-enriched
population rotates faster than the other two populations at a 2 sigma
confidence level. While our data further suggest that the intermediate
population shows the least amount of rotation, this trend is rather marginal (1
- 2 sigma). Using axisymmetric Jeans models, we show that these findings can be
explained from the radial distributions of the populations if they possess
different angular momenta. Our findings suggest that the populations formed
with primordial kinematical differences.
