The HST Large Programme on ω Centauri. II. Internal Kinematics

  title={The HST Large Programme on $\omega$ Centauri. II. Internal Kinematics},
  author={Andrea Bellini and Mattia Libralato and Luigi R. Bedin and Antonino P. Milone and Roeland van der Marel and Jay Anderson and D{\'a}niel Apai and Adam J. Burgasser and Anna Fabiola Marino and Jon M. Rees},
  journal={The Astrophysical Journal},
In this second installment of the series, we look at the internal kinematics of the multiple stellar populations of the globular cluster ω Centauri in one of the parallel Hubble Space Telescope (HST) fields, located at about 3.5 half-light radii from the center of the cluster. Thanks to the over 15 yr long baseline and the exquisite astrometric precision of the HST cameras, well-measured stars in our proper-motion catalog have errors as low as ∼10 μas yr−1, and the catalog itself extends to… 

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