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hal.structure.identifierM2A 2012
dc.contributor.authorBOURDA, G.
hal.structure.identifierM2A 2012
dc.contributor.authorCHARLOT, P.
dc.date.created2011
dc.date.issued2012
dc.date.conference2011
dc.description.abstractEnThe European space astrometry mission Gaia will construct a dense optical QSO-based celestial reference frame. For consistency between optical and radio positions, it will be fundamental to align the Gaia and VLBI frames with the highest accuracy. A proper alignment is also important in the framework of astrophysics, for example to probe properly the AGN jets properties and the physics of these objects. The VLBI-Gaia frame alignment requires quasars that are bright at optical wavelength, that have a compact radio core, and that do not exhibit complex structures. In this paper, we draw prospects for this alignment, based on the ICRF2 catalogue and an ongoing dedicated VLBI project designed to observe additional weaker extragalactic radio sources for this purpose. The list of suitable sources will have to be monitored to check the relevance of the sources for the alignment, especially in terms of position stability and structures. Accordingly, we present the observations we envision in the framework of the IVS and other VLBI networks, before and during the Gaia mission.
dc.language.isoen
dc.source.titleProc. Journées Systèmes de Référence Spatio-Temporels 2011: "Earth rotation, reference systems, and celestial mechanics: Synergies of geodesy and astrometry" eds. H. Schuh, J. Boehm, T. Nilsson, N. Capitaine, Vienne - Autriche, 19-21 Septembre 2011, pp. 70−73. - 2012
dc.title.enPlans for an accurate alignment of the VLBI frame and the future Gaia frame
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.journalUntitled
bordeaux.page70-73
bordeaux.volume-
bordeaux.countryAT
bordeaux.title.proceedingProc. Journées Systèmes de Référence Spatio-Temporels 2011: "Earth rotation, reference systems, and celestial mechanics: Synergies of geodesy and astrometry" eds. H. Schuh, J. Boehm, T. Nilsson, N. Capitaine, Vienne - Autriche, 19-21 Septembre 2011, pp. 70−73. - 2012
bordeaux.conference.cityVienne
bordeaux.peerReviewedoui
hal.identifierhal-00838357
hal.version1
hal.invitednon
hal.proceedingsoui
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00838357v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.btitle=Proc.%20Journ%C3%A9es%20Syst%C3%A8mes%20de%20R%C3%A9f%C3%A9rence%20Spatio-Temporels%202011:%20%22Earth%20rotation,%20reference%20systems,%20and%20celestial%20mechanics:%&rft.jtitle=Untitled&rft.date=2012&rft.volume=-&rft.spage=70-73&rft.epage=70-73&rft.au=BOURDA,%20G.&CHARLOT,%20P.&rft.genre=unknown


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