Article Dans Une Revue Astronomy & Astrophysics - A&A Année : 2018

Gaia Data Release 2. The catalogue of radial velocity standard stars

C. Soubiran
L. Chemin
N. Brouillet
J.-F. Le Campion
  • Fonction : Auteur
G. Seabroke
A. Guerrier
  • Fonction : Auteur
C. Fabre
  • Fonction : Auteur
Y. Lasne
  • Fonction : Auteur
  • PersonId : 963816
G. Tauran
  • Fonction : Auteur

Résumé

Aims. The Radial Velocity Spectrometer (RVS) on board the ESA satellite mission Gaia has no calibration device. Therefore, the radial velocity zero point needs to be calibrated with stars that are proved to be stable at a level of 300 m s−1 during the Gaia observations.Methods. We compiled a dataset of ~71 000 radial velocity measurements from five high-resolution spectrographs. A catalogue of 4813 stars was built by combining these individual measurements. The zero point was established using asteroids.Results. The resulting catalogue has seven observations per star on average on a typical time baseline of 6 yr, with a median standard deviation of 15 m s−1. A subset of the most stable stars fulfilling the RVS requirements was used to establish the radial velocity zero point provided in Gaia Data Release 2. The stars that were not used for calibration are used to validate the RVS data.

Fichier principal
Vignette du fichier
aa32795-18.pdf (3.98 Mo) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte
Licence

Dates et versions

hal-01867536 , version 1 (13-11-2020)

Licence

Identifiants

Citer

C. Soubiran, Gérard Jasniewicz, L. Chemin, C. Zurbach, N. Brouillet, et al.. Gaia Data Release 2. The catalogue of radial velocity standard stars. Astronomy & Astrophysics - A&A, 2018, 616, pp.A7. ⟨10.1051/0004-6361/201832795⟩. ⟨hal-01867536⟩
651 Consultations
291 Téléchargements

Altmetric

Partager

  • More