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Calibration of the Gaia RVS from ground-based observations of candidate standard stars

hal.structure.identifiersSE 2011
dc.contributor.authorCHEMIN, L.
hal.structure.identifierM2A 2011
dc.contributor.authorSOUBIRAN, C.
hal.structure.identifierGalaxies, Etoiles, Physique, Instrumentation [GEPI]
hal.structure.identifierObservatoire de Paris - Site de Paris [OP]
dc.contributor.authorCRIFO, Françoise
hal.structure.identifierGroupe de Recherche en Astronomie et Astrophysique du Languedoc [GRAAL]
dc.contributor.authorJASNIEWICZ, Gérard
hal.structure.identifierGalaxies, Etoiles, Physique, Instrumentation [GEPI]
hal.structure.identifierObservatoire de Paris - Site de Paris [OP]
dc.contributor.authorKATZ, David
hal.structure.identifierInstitut de Mécanique Céleste et de Calcul des Ephémérides [IMCCE]
dc.contributor.authorHESTROFFER, Daniel
hal.structure.identifierObservatoire Astronomique de l'Université de Genève [ObsGE]
dc.contributor.authorUDRY, Stéphane
dc.contributor.editorEds.: G. Alecian
dc.contributor.editorK. Belkacem
dc.contributor.editorR. Samadi and D. Valls-Gabaud
dc.date.issued2011-12
dc.date.conference2011-06-20
dc.description.abstractEnThe Radial Velocity Spectrometer (RVS) on board of Gaia will perform a large spectroscopic survey to determine the radial velocities of some 1.5 × 10^8 stars. We present the status of ground-based observations of a sample of 1420 candidate standard stars designed to calibrate the RVS. Each candidate star has to be observed several times before Gaia launch (and at least once during the mission) to ensure that its radial velocity remains stable during the whole mission. Observations are performed with the high-resolution spectrographs SOPHIE, NARVAL and CORALIE, completed with archival data of the ELODIE and HARPS instruments. The analysis shows that about 7% of the current catalogue exhibits variations larger than the adopted threshold of 300 m s^{-1}. Consequently, those stars should be rejected as reference targets, due to the expected accuracy of the Gaia RVS. Emphasis is also put here on our observations of bright asteroids to calibrate the ground-based velocities by a direct comparison with celestial mechanics. It is shown that the radial velocity zero points of SOPHIE, NARVAL and CORALIE are consistent with each other, within the uncertainties. Despite some scatter, their temporal variations remain small with respect to our adopted stability criterion.
dc.language.isoen
dc.source.titleSF2A-2011: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics
dc.subject.enGalaxy : kinematics and dynamics
dc.subject.enGalaxy : structure
dc.subject.enStars: kinematics and dynamics
dc.subject.enMinor planets
dc.subject.enasteroids: general
dc.subject.enSurveys
dc.subject.enTechniques: radial velocities
dc.title.enCalibration of the Gaia RVS from ground-based observations of candidate standard stars
dc.typeCommunication dans un congrès
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP]
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP]
bordeaux.page271-274
bordeaux.conference.titleSF2A 2011: Annual meeting of the French Society of Astronomy and Astrophysics
bordeaux.countryFR
bordeaux.title.proceedingSF2A-2011: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics
bordeaux.conference.cityParis
bordeaux.peerReviewedoui
hal.identifierhal-00647650
hal.version1
hal.invitednon
hal.proceedingsoui
hal.conference.end2011-06-23
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00647650v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.btitle=SF2A-2011:%20Proceedings%20of%20the%20Annual%20meeting%20of%20the%20French%20Society%20of%20Astronomy%20and%20Astrophysics&rft.date=2011-12&rft.spage=271-274&rft.epage=271-274&rft.au=CHEMIN,%20L.&SOUBIRAN,%20C.&CRIFO,%20Fran%C3%A7oise&JASNIEWICZ,%20G%C3%A9rard&KATZ,%20David&rft.genre=unknown


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