Afficher la notice abrégée

hal.structure.identifierM2A 2019
dc.contributor.authorGATTANO, C.
hal.structure.identifierM2A 2019
dc.contributor.authorCHARLOT, P.
dc.date.issued2019
dc.date.conference2018-06-03
dc.description.abstractEnMost of the radio sources observed by VLBI, some used as defining sources in the International Celestial Reference Frame [ICRF2], show instabilities in position. These instabilities may be caused by astrophysical phenomena occurring in the central VLBI region of these objects (i.e., active galactic nuclei). On this basis, we have begun to characterize the signal included in the available VLBI position time series. Often, position instabilities happen along a preferred direction. There are cases, however, where two directions are distinguishable. The first scenario is consistent with a regular emergence of jet components from the VLBI core; hence, causing shifts of the radio emission centroid. On the other hand, the second scenario may give clues to the presence of a second black hole within the system that has its own activity offset from that of the first black hole. Comparing these directions with the orientation derived from radio-optical position offset brings further insights into astrophysical phenomena within active galactic nuclei.
dc.language.isoen
dc.title.enInsight into Astrophysical Phenomena from VLBI Source 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]
bordeaux.countryNO
bordeaux.conference.citysvalbard
bordeaux.peerReviewedoui
hal.identifierhal-02278204
hal.version1
hal.invitednon
hal.proceedingsnon
hal.conference.end2018-06-06
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02278204v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.date=2019&rft.au=GATTANO,%20C.&CHARLOT,%20P.&rft.genre=unknown


Fichier(s) constituant ce document

FichiersTailleFormatVue

Il n'y a pas de fichiers associés à ce document.

Ce document figure dans la(les) collection(s) suivante(s)

Afficher la notice abrégée