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Exploring Source Structure with the Bordeaux VLBI Image Database Comparing Jet Directions with Optical-Radio Offset Vectors

hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorCOLLIOUD, Arnaud
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorCHARLOT, P.
hal.structure.identifierSystèmes de Référence Temps Espace [SYRTE]
dc.contributor.authorLAMBERT, Sébastien
dc.date.issued2022-04
dc.date.conference2022-03-28
dc.description.abstractEnThe Bordeaux VLBI Image Database provides to the international VLBI community almost 8,000 VLBI images of radio sources at S and X band and some others at K and Q band. Such images are of interest for astrometric and astrophysical applications, such as the determination of the VLBI jet direction. We developed a fully automatic method to extract this direction from any VLBI image, which we then applied to all BVID images, resulting in the production of 9,215 jet directions for 1,221 sources. Comparing the mean jet directions over all epochs at X band to the Gaia EDR3 (optical) − ICRF3 S/X (radio) offset vector directions indicates that the offset vector is aligned within 30 • of the jet direction in roughly half of the sources, thereby confirming previous studies.
dc.language.isoen
dc.source.titleIVS 2022 General Meeting Proceedings
dc.subject.enVLBI
dc.subject.enDatabase
dc.subject.enImaging
dc.subject.enSource Structure
dc.subject.enJet Direction
dc.subject.enICRF
dc.subject.enGaia
dc.title.enExploring Source Structure with the Bordeaux VLBI Image Database Comparing Jet Directions with Optical-Radio Offset Vectors
dc.typeCommunication dans un congrès
dc.subject.halPlanète et Univers [physics]
bordeaux.conference.title12th General Meeting of the International VLBI Service for Geodesy and Astrometry (IVS)
bordeaux.countryFR
bordeaux.title.proceedingIVS 2022 General Meeting Proceedings
bordeaux.conference.cityOn line
bordeaux.peerReviewedoui
hal.identifierobspm-03964399
hal.version1
hal.proceedingsnon
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//obspm-03964399v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.btitle=IVS%202022%20General%20Meeting%20Proceedings&rft.date=2022-04&rft.au=COLLIOUD,%20Arnaud&CHARLOT,%20P.&LAMBERT,%20S%C3%A9bastien&rft.genre=unknown


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