Unlocking Galactic Wolf–Rayet stars with Gaia DR2 – II. Cluster and association membership

  title={Unlocking Galactic Wolf–Rayet stars with Gaia DR2 – II. Cluster and association membership},
  author={Gemma Rate and Paul A. Crowther and Richard J. Parker},
  journal={Monthly Notices of the Royal Astronomical Society},
Galactic Wolf-Rayet (WR) star membership of star forming regions can be used to constrain the formation environments of massive stars. Here, we utilise $\textit{Gaia}$ DR2 parallaxes and proper motions to reconsider WR star membership of clusters and associations in the Galactic disk, supplemented by recent near-IR studies of young massive clusters. We find that only 18$-$36% of 553 WR stars external to the Galactic Centre region are located in clusters, OB associations or obscured star-forming… 
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