Gaia Data Release 2

@inproceedings{Katz2021GaiaDR,
  title={Gaia Data Release 2},
  author={Daniel Martin Katz and Paola Sartoretti and Mark S. Cropper and Pasquale Panuzzo and George Seabroke and Y. P. Viala and Kevin Benson and R. Blomme and G{\'e}rard Jasniewicz and A. Jean-Antoine and Howard E. Huckle and M. W. L. Smith and Stephen Baker and F. Crifo and Yassine Damerdji and M. David and Chris Dolding and Yves Fr{\'e}mat and Eric Gosset and A. Guerrier and Leanne P. Guy and R{\'e}gis Haigron and Katja Janssen and Olivier Marchal and G. Plum and C. Soubiran and F. Th{\'e}venin and M. Ajaj and Carlos Allende Prieto and C. Babusiaux and Steve Boudreault and Laurent Chemin and Claire Delle Luche and Caroline Fabre and Alain Gueguen and Nigel C. Hambly and Yannick Lasne and Fr{\'e}d{\'e}ric Meynadier and Fr{\'e}d{\'e}ric Pailler and Chantal Panem and Fr{\'e}d{\'e}ric Royer and G. Tauran and Christine Zurbach and Toma{\vz} Zwitter and Fr{\'e}d{\'e}ric Arenou and Diego Bossini and Joris Gerssen and Ana E. G{\'o}mez and Vincent Lema{\^i}tre and Nicolas Leclerc and Thierry Morel and U. Munari and C. Turon and Antonella Vallenari},
  year={2021}
}
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… 

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