Gaia Data Release 2

  title={Gaia Data Release 2},
  author={D. Katz and P. Sartoretti and M. Cropper and P. Panuzzo and G. Seabroke and Y. Viala and K. Benson and R. Blomme and G. Jasniewicz and A. Jean-Antoine and H. Huckle and M. Smith and S. Baker and F. Crifo and Y. Damerdji and M. David and C. Dolding and Y. Fr{\'e}mat and E. Gosset and A. Guerrier and L. Guy and R. Haigron and K. Janssen and O. Marchal and G. Plum and C. Soubiran and F. Th{\'e}venin and M. Ajaj and C. Prieto and C. Babusiaux and S. Boudreault and L. Chemin and C. D. Luche and C. Fabre and A. Gueguen and N. Hambly and Y. Lasne and F. Meynadier and F. Pailler and C. Panem and F. Royer and G. Tauran and C. Zurbach and T. Zwitter and Fr{\'e}d{\'e}ric Arenou and D. Bossini and J. Gerssen and A. G{\'o}mez and V. Lema{\^i}tre and N. Leclerc and T. Morel and U. Munari and C. Turon and A. Vallenari},
Context. For Gaia DR2, 280 million spectra collected by the Radial Velocity Spectrometer instrument on board Gaia were processed, and median radial velocities were derived for 9.8 million sources brighter than GRVS = 12 mag. Aims. This paper describes the validation and properties of the median radial velocities published in Gaia DR2. Methods. Quality tests and filters were applied to select those of the 9.8 million radial velocities that have the quality to be published in Gaia DR2. The… Expand
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