Gaia Data Release 2. The catalogue of radial velocity standard stars
MARCHAL, O.
Probabilités, statistique, physique mathématique [PSPM]
Galaxies, Etoiles, Physique, Instrumentation [GEPI]
Probabilités, statistique, physique mathématique [PSPM]
Galaxies, Etoiles, Physique, Instrumentation [GEPI]
DAMERDJI, Y.
Centre de Recherche en Astronomie Astrophysique et Géophysique [CRAAG]
Institut d'Astrophysique et de Géophysique [Liège]
Centre de Recherche en Astronomie Astrophysique et Géophysique [CRAAG]
Institut d'Astrophysique et de Géophysique [Liège]
GUEGUEN, A.
Galaxies, Etoiles, Physique, Instrumentation [GEPI]
Max Planck Institute for Extraterrestrial Physics [MPE]
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Galaxies, Etoiles, Physique, Instrumentation [GEPI]
Max Planck Institute for Extraterrestrial Physics [MPE]
Language
en
Article de revue
This item was published in
Astronomy and Astrophysics - A&A. 2018, vol. 616, p. A7
EDP Sciences
English Abstract
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 ...Read more >
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.Read less <
English Keywords
standards
catalogs
stars: kinematics and dynamics
techniques: radial velocities
catalogs – standards – techniques: radial velocities – stars: kinematics and dynamics
Origin
Hal imported