Gaia radial velocities: first comparisons with ground values

Abstract : After several months of Gaia-RVS observations, many radial velocities are now available and can be compared to existing ground values. An extended catalogue of 10227 reliable ground-based RV has been compiled from different sources including our own observations of standard star candidates, and objects with good archive spectra. First conclusions are: Some 4000 comparison stars already observed several times during the 3 first months of operation show a gaussian dispersion around the ground-based value on the order of 1.1km/s; some stars show a slight evolution of their RVS measurements and are probably binaries; some RVS observations show "irregularities" now explored in details. It is particularly important to note that our 2798 primary standard star candidates (extended list), are very stable over the Gaia mission. For the others, the last ground-based campaign anticipated 10 years ago to assess their stability, should be now started.
Type de document :
Communication dans un congrès
2015sf2a.conf.359C - SF2A-2015: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics. Eds.: F. Martins, S. Boissier, V. Buat, L. Cambrésy, P. Petit, pp.359-362 – held in Toulouse du 2 au 5 juin 2015, Jun 2015, Toulouse, France. pp.359 - 362, 2015
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-01250151
Contributeur : Marie-Paule Pomies <>
Soumis le : lundi 4 janvier 2016 - 13:16:36
Dernière modification le : mardi 10 octobre 2017 - 16:16:26

Identifiants

Collections

Citation

F., Crifo, G., Jasniewicz, D., Katz, O., Marchal, P., Panuzzo, et al.. Gaia radial velocities: first comparisons with ground values. 2015sf2a.conf.359C - SF2A-2015: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics. Eds.: F. Martins, S. Boissier, V. Buat, L. Cambrésy, P. Petit, pp.359-362 – held in Toulouse du 2 au 5 juin 2015, Jun 2015, Toulouse, France. pp.359 - 362, 2015. 〈hal-01250151〉

Partager

Métriques

Consultations de la notice

123