Kinematic modelling of clusters with Gaia: the death throes of the Hyades

  title={Kinematic modelling of clusters with Gaia: the death throes of the Hyades},
  author={Semyeong Oh and Neil Wyn Evans},
  journal={Monthly Notices of the Royal Astronomical Society},
  • S. Oh, N. W. Evans
  • Published 6 July 2020
  • Physics
  • Monthly Notices of the Royal Astronomical Society
The precision of the Gaia data offers a unique opportunity to study the internal velocity field of star clusters. We develop and validate a forward-modelling method for the internal motions of stars in a cluster. The model allows an anisotropic velocity dispersion matrix and linear velocity gradient describing rotation and shear, combines radial velocities available for a subset of stars, and accounts for contamination from background sources via a mixture model. We apply the method to Gaia DR2… Expand

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