Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project

  title={Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project},
  author={Jos H.J. de Bruijne and Anna-Christina Eilers},
  journal={Astronomy and Astrophysics},
(abridged) The Hundred-Thousand-Proper-Motion (HTPM) project will determine the proper motions of ~113500 stars using a 23-year baseline. The proper motions will use the Hipparcos data, with epoch 1991.25, as first epoch and the first intermediate-release Gaia astrometry, with epoch ~2014.5, as second epoch. The expected HTPM proper-motion standard errors are 30-190 muas/yr, depending on stellar magnitude. Depending on the characteristics of an object, in particular its distance and velocity… Expand
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