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Journal articles
Gaia Data Release 2: Properties and validation of the radial velocities
D. Katz
1
P. Sartoretti
1
M. Cropper
P. Panuzzo
1
G. M. Seabroke
Y. Viala
1
K. Benson
2
R. Blomme
3
Gérard Jasniewicz
4
A. Jean-Antoine
5
H. Huckle
M. Smith
S. Baker
F. Crifo
1
Y. Damerdji
6
M. David
C. Dolding
Y. Frémat
E. Gosset
7
A. Guerrier
5
L. P. Guy
8
R. Haigron
1
K. Janßen
O. Marchal
1
G. Plum
1
C. Soubiran
9
F. Thevenin
10
M. Ajaj
1
C. Allende Prieto
C. Babusiaux
11, 1
S. Boudreault
12
L. Chemin
C. Delle Luche
1
C. Fabre
A. Gueguen
1
N. C. Hambly
Y. Lasne
F. Meynadier
13, 1
F. Pailler
C. Panem
F. Royer
1
G. Tauran
C. Zurbach
4
T. Zwitter
F. Arenou
1
D. Bossini
A. Gómez
1
V. Lemaitre
N. Leclerc
1
T. Morel
U. Munari
C. Turon
1
A. Vallenari
M. Žerjal
S. Baker
Author
F. Crifo 1
Author
Y. Damerdji 6
Author
M. David
Author IdHAL : matthieu-david7 ORCID : https://orcid.org/0000-0002-0893-1729
G. Plum 1
Author
C. Soubiran 9
Author IdHAL : caroline-soubiran arXiv : https://arxiv.org/a/caroline.soubiran ORCID : https://orcid.org/0000-0003-3304-8134
F. Thevenin 10
Author
M. Ajaj 1
Author
F. Arenou 1
Author IdHAL : frederic-arenou arXiv : https://arxiv.org/a/arenou_f_1 ResearcherId : http://www.researcherid.com/rid/B-1846-2014 IdRef : https://www.idref.fr/150331827 ORCID : https://orcid.org/0000-0003-2837-3899 ISNI : http://isni.org/isni/0000000357715931
D. Bossini
Author
A. Gómez 1
Author
V. Lemaitre
Author
A. Vallenari
Author
M. Žerjal
Author
1
GEPI - Galaxies, Etoiles, Physique, Instrumentation (5, place Jules Janssen 92195 MEUDON CEDEX - France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- Observatoire de Paris (61 Av de l'Observatoire 75014 PARIS - France)
- PSL - Université Paris sciences et lettres (60 rue Mazarine 75006 Paris - France)
- CNRS - Centre National de la Recherche Scientifique : UMR_8111 (France)
2
MSSL - Mullard Space Science Laboratory (Holmbury Hill Rd, Dorking RH5 6NT - United Kingdom)
- UCL - University College of London [London] (Gower Street, London WC1E 6BT - United Kingdom)
3
ROB - Royal Observatory of Belgium [Brussels] (Ringlaan 3 1180 Brussels - Belgium)
4
LUPM - Laboratoire Univers et Particules de Montpellier (Université de Montpellier Place Eugène Bataillon - CC 72 34095 Montpellier Cédex 05 - France)
- UM - Université de Montpellier (163 rue Auguste Broussonnet - 34090 Montpellier - France)
- UM2 - Université Montpellier 2 - Sciences et Techniques (Place Eugène Bataillon - 34095 Montpellier cedex 5 - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- CNRS - Centre National de la Recherche Scientifique : UMR5299 (France)
5
CNES - Centre National d'Études Spatiales [Toulouse] (18 avenue Edouard Belin 31401 Toulouse - France)
6
CESR - Centre d'étude spatiale des rayonnements (9 Av du colonel Roche - BP 4346 31028 TOULOUSE CEDEX 4 - France)
- UT3 - Université Toulouse III - Paul Sabatier (118 route de Narbonne - 31062 Toulouse - France)
- Université Fédérale Toulouse Midi-Pyrénées (41 Allée Jules Guesde, 31000 Toulouse - France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- CNRS - Centre National de la Recherche Scientifique : UMR5187 (France)
- OMP - Observatoire Midi-Pyrénées (14 avenue Edouard Belin, 31400 TOULOUSE - France)
- IRD - Institut de Recherche pour le Développement (Siège Le Sextant 44, bd de Dunkerque CS 90009 13572 Marseille cedex 02 - France)
- CNRS - Centre National de la Recherche Scientifique (France)
- Université Fédérale Toulouse Midi-Pyrénées (41 Allée Jules Guesde, 31000 Toulouse - France)
- CNES - Centre National d'Études Spatiales [Toulouse] (18 avenue Edouard Belin 31401 Toulouse - France)
- Météo France (France)
7
UPJV - Université de Picardie Jules Verne (Chemin du Thil - 80000 Amiens - France)
8
IFS - Laboratory of the Institute for Fiscal Studies (The Institute for Fiscal Studies 7 Ridgmount Street, London WC1E 7AE. - United Kingdom)
- Institute for Fiscal Studies (United Kingdom)
9
M2A 2019 (France)
- LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac] (Bât B18N - Allée Geoffroy Saint Hilaire
CS 50023 - 33615 Pessac Cedex France
- France)
- UB - Université de Bordeaux (35, place Pey Berland - 33076 Bordeaux - France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- CNRS - Centre National de la Recherche Scientifique : UMR5804 (France)
10
LAGRANGE - Joseph Louis LAGRANGE (Boulevard de l'Observatoire B.P. 4229 06304 Nice Cedex 04 - France - France)
- CNRS - Centre National de la Recherche Scientifique : UMR7293 (France)
- Observatoire de la Côte d'Azur (France)
- UCA - Université Côte d'Azur (Parc Valrose, 28 avenue Valrose 06108 Nice Cedex 2 - France)
- COMUE UCA - COMUE Université Côte d'Azur (2015 - 2019) (Parc Valrose, 28 avenue Valrose 06108 Nice Cedex 2 - France)
- UNS - Université Nice Sophia Antipolis (... - 2019) (Parc Valrose - BP 2135 - 06103 Nice cedex 2 - France)
- COMUE UCA - COMUE Université Côte d'Azur (2015 - 2019) (Parc Valrose, 28 avenue Valrose 06108 Nice Cedex 2 - France)
- UCA - Université Côte d'Azur (Parc Valrose, 28 avenue Valrose 06108 Nice Cedex 2 - France)
11
IPAG - Institut de Planétologie et d'Astrophysique de Grenoble (414, Rue de la Piscine BP 53 38041 Grenoble Cedex 9 - France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- CNES - Centre National d'Études Spatiales [Toulouse] (18 avenue Edouard Belin 31401 Toulouse - France)
- CNRS - Centre National de la Recherche Scientifique (France)
- OSUG - Observatoire des Sciences de l'Univers de Grenoble (414 Rue de la piscine - BP 53 38041 GRENOBLE CEDEX 9 - France)
- Grenoble INP - Institut polytechnique de Grenoble - Grenoble Institute of Technology (46 avenue Félix Viallet 38031 Grenoble Cedex 1 - France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- IRSTEA - Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (France)
- USMB [Université de Savoie] [Université de Chambéry] - Université Savoie Mont Blanc (27, rue Marcoz - 73000 Chambéry - France)
- CNRS - Centre National de la Recherche Scientifique : UMS832 (France)
- UGA [2016-2019] - Université Grenoble Alpes [2016-2019] (CS 40700 - 38058 Grenoble cedex - France)
12
MPS - Max-Planck-Institut für Sonnensystemforschung (Göttingen, Allemagne - Germany)
- Max-Planck-Gesellschaft (Jägerstrasse, 10-11, D-10117 Berlin - Germany)
13
LNE - SYRTE - Laboratoire national de métrologie et d'essais - Systèmes de Référence Temps-Espace (61 avenue de l'Observatoire, 75014 Paris - France)
- SYRTE - Systèmes de Référence Temps Espace (61 Av de l'Observatoire 75014 PARIS - France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- Observatoire de Paris (61 Av de l'Observatoire 75014 PARIS - France)
- PSL - Université Paris sciences et lettres (60 rue Mazarine 75006 Paris - France)
- SU - Sorbonne Université (21 rue de l’École de médecine - 75006 Paris - France)
- CNRS - Centre National de la Recherche Scientifique : UMR8630 (France)
Abstract : 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 accuracy of the selected sample was assessed with respect to ground-based catalogues. Its precision was estimated using both ground-based catalogues and the distribution of the Gaia radial velocity uncertainties. Results. Gaia DR2 contains median radial velocities for 7 224 631 stars, with Teff in the range [3550, 6900] K, which successfully passed the quality tests. The published median radial velocities provide a full-sky coverage and are complete with respect to the astrometric data to within 77.2% (for G ≤ 12.5 mag). The median radial velocity residuals with respect to the ground-based surveys vary from one catalogue to another, but do not exceed a few 100 m s−1. In addition, the Gaia radial velocities show a positive trend as a function of magnitude, which starts around GRVS ~ 9 mag and reaches about + 500 m s−1 at GRVS = 11.75 mag. The origin of the trend is under investigation, with the aim to correct for it in Gaia DR3. The overall precision, estimated from the median of the Gaia radial velocity uncertainties, is 1.05 km s−1. The radial velocity precision is a function of many parameters, in particular, the magnitude and effective temperature. For bright stars, GRVS ∈ [4, 8] mag, the precision, estimated using the full dataset, is in the range 220–350 m s−1, which is about three to five times more precise than the pre-launch specification of 1 km s−1. At the faint end, GRVS = 11.75 mag, the precisions for Teff = 5000 and 6500 K are 1.4 and 3.7 km s−1, respectively.
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Journal articles
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https://hal.archives-ouvertes.fr/hal-01868258
Contributor : Marie-Paule Pomies <>
Submitted on : Tuesday, November 17, 2020 - 10:31:15 AM
Last modification on : Friday, January 8, 2021 - 4:26:32 PM
Contributor : Marie-Paule Pomies <>
Submitted on : Tuesday, November 17, 2020 - 10:31:15 AM
Last modification on : Friday, January 8, 2021 - 4:26:32 PM
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aa33273-18.pdf
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Identifiers
- HAL Id : hal-01868258, version 1
- ARXIV : 1804.09372
- BIBCODE : 2019A&A...622A.205K
- DOI : 10.1051/0004-6361/201833273
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L3AB | CNRS | OMP | OMP-IRAP | OCA | LUPM | DSM-IRFU | IRFU-AIM | LNE | MIPS | UNIV-MONTPELLIER | UNIV-COTEDAZUR | CEA-DRF | EC-LYON | INSU | OBSPM | UNIV-ST-ETIENNE | UNICE | CEA | UNIV-TLSE3 | ICJ | IN2P3 | INSA-LYON | UNIV-LYON1 | INSA-GROUPE | SORBONNE-UNIVERSITE | SYRTE | INRAE | LUPM_AS | SU-SCIENCES | ICJ-PSPM | UNIV-PARIS | UDL | IRSTEA | UGA | UNIV-SAVOIE | LAGRANGE | UNIV-PARIS7 | USPC | PSL | METEO | GEPI | UP-SCIENCES | IRD | IPAG | SU-TI
Citation
D. Katz, P. Sartoretti, M. Cropper, P. Panuzzo, G. M. Seabroke, et al.. Gaia Data Release 2: Properties and validation of the radial velocities. Astronomy and Astrophysics - A&A, EDP Sciences, 2019, 622, pp.A205. ⟨10.1051/0004-6361/201833273⟩. ⟨hal-01868258⟩
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