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Kinematic versus Spectroscopic Radial Velocities for the Gaia RVS

hal.structure.identifierGroupe de Recherche en Astronomie et Astrophysique du Languedoc [GRAAL]
dc.contributor.authorJASNIEWICZ, Gérard
dc.contributor.authorTHÉVENIN, F.
dc.contributor.authorCHIAVASSA, A.
hal.structure.identifierLaboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
dc.contributor.authorBIGOT, Lionel
hal.structure.identifierM2A 2013
dc.contributor.authorCHEMIN, L.
hal.structure.identifierGalaxies, Etoiles, Physique, Instrumentation [GEPI]
dc.contributor.authorCRIFO, F.
hal.structure.identifierInstitut de Mécanique Céleste et de Calcul des Ephémérides [IMCCE]
dc.contributor.authorHESTROFFER, D.
hal.structure.identifierGalaxies, Etoiles, Physique, Instrumentation [GEPI]
hal.structure.identifierObservatoire de Paris - Site de Paris [OP]
dc.contributor.authorKATZ, D.
dc.contributor.authorSARTORETTI, P.
hal.structure.identifierM2A 2013
dc.contributor.authorSOUBIRAN, C.
hal.structure.identifierObservatoire Astronomique de l'Université de Genève [ObsGE]
dc.contributor.authorUDRY, S.
hal.structure.identifierLaboratoire Univers et Particules de Montpellier [LUPM]
dc.contributor.authorZURBACH, C.
dc.date.issued2013-11
dc.date.conference2013
dc.description.abstractEnThe Gaia spectrometer (RVS) has no built-in calibration device and the RVS will rely on its own observations to carry out the wavelength calibration. A small sample (˜1420) of bright RVS F-G-K standard stars will be used for the Radial Velocity Zero Point (RVZP) of the RVS. These standard stars have been observed on the ground with the Sophie, Coralie and Narval spectrometers, and their Spectroscopic Radial Velocities (SRVs) have been published by Soubiran et al. (2013). These SRVs are not Kinematic Radial Velocities (KRVs) which are what we need for studies of galatic dynamics. However in this paper we show that these SRVs are well suited to establish the Radial Velocity Zero Point of the Gaia RVS, provided that CU6 pipelines of the DPAC such as Calibration of the RVS (DU630) and Determination of RVs by cross-correlation with templates (DU650 STA) really use wavelength lines and spectra computed with 3D hydrodynamical model atmospheres, which conveniently treat the convective shifts. Final SRVs given by the Gaia CU6 pipelines and later published in the Gaia final catalogue would then only be corrected from the gravitational shift by the DPAC CU8 in order to become true KRVs.
dc.language.isoen
dc.source.titleSF2A-2013: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics.- 4 au 7 juin 2013 à Montpellier,France Eds.: L. Cambresy, F. Martins, E. Nuss, A. Palacios - pp.137-140
dc.title.enKinematic versus Spectroscopic Radial Velocities for the Gaia RVS
dc.typeCommunication dans un congrès
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Instrumentation et méthodes pour l'astrophysique [astro-ph.IM]
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Instrumentation et méthodes pour l'astrophysique [astro-ph.IM]
bordeaux.journalSF2A-2013: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics
bordeaux.page137-140
bordeaux.conference.titleProceedings SF2A 2013 - Scientific highlights
bordeaux.countryFR
bordeaux.title.proceedingSF2A-2013: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics.- 4 au 7 juin 2013 à Montpellier,France Eds.: L. Cambresy, F. Martins, E. Nuss, A. Palacios - pp.137-140
bordeaux.conference.cityMontpellier
bordeaux.peerReviewedoui
hal.identifierhal-00909536
hal.version1
hal.invitednon
hal.proceedingsoui
hal.popularnon
hal.audienceInternationale
dc.subject.esGaia
dc.subject.esRVS
dc.subject.esRadial velocities
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00909536v1
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