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Source structure and VLBI position instabilities

hal.structure.identifierM2A 2012
dc.contributor.authorBOUFFET, Romuald
hal.structure.identifierM2A 2012
dc.contributor.authorCHARLOT, P.
hal.structure.identifierSystèmes de Référence Temps Espace [SYRTE]
dc.contributor.authorLAMBERT, Sébastien
dc.date.conference2012
dc.description.abstractEnMost of the extragalactic radio sources that materialize the International Celestial Reference Frame (ICRF) exhibit spatially - extended structures on milliarcsecond scales which limit the accuracy of the source positions estimated from Very Long Baseline Interferometry (VLBI) data. These structures when varying with time may also lead to instabilities in the source positions. Structural variations are generally due to ejection of material from the VLBI core in a recurrent although unpredictable manner. Based on the available VLBI astrometric data and source images, we compare position instabilities and structural variations and conclude about the level of correlation between the two phenomena.
dc.language.isoen
dc.title.enSource structure and VLBI position instabilities
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.conference.titleIAU Joint Discussion 7: Space-Time Reference Systems for Future Research at IAU General Assembly-Beijing. 27-29 August 2012 in Beijing, China Online at http://referencesystems.info/iau-joint-discussion-7.html, id.P15
bordeaux.countryCN
bordeaux.conference.citybeijing
bordeaux.peerReviewedoui
hal.identifierhal-00838698
hal.version1
hal.invitednon
hal.proceedingsnon
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00838698v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.au=BOUFFET,%20Romuald&CHARLOT,%20P.&LAMBERT,%20S%C3%A9bastien&rft.genre=unknown


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