Published September 11, 2023 | Version v1

The kinematics of multiple stellar populations in 25 Milky Way globular clusters

  • 1. University of Queensland
  • 2. European Southern Observatory
  • 3. Heidelberg University

Description

Dynamically young globular clusters can be assumed as approximately representative of their initial conditions. We determined the spatial distributions of multiple stellar populations in 30 globular clusters and discovered that the dynamically youngest clusters in our sample can have a range of spatial configurations. Enriched stars (P2) were previously assumed to be centrally concentrated for dynamically young clusters, but in our sample we find they can also be P1 centrally concentrated, or spatially mixed. We then explored the kinematics for 25 of the 30 clusters and discovered there are no significant differences in the rotation axes or 3D rotational amplitudes of the multiple populations in our dynamically younger sample. Despite discovering differences in their spatial distributions, we find no kinematic differences between the multiple populations.

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Is described by
Journal article: 10.1093/mnras/stad093 (DOI)