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Monitoring the Bidirectional Relativistic Jets of the Radio Galaxy 1946+708

dc.contributor.authorTAYLOR, G. B.
hal.structure.identifierLaboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
hal.structure.identifierObservatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorCHARLOT, P.
dc.contributor.authorVERMEULEN, R. C.
hal.structure.identifierLaboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
hal.structure.identifierObservatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorPRADEL, N.
dc.date.issued2009
dc.identifier.issn0004-637X
dc.description.abstractEnWe report on a multifrequency, multi-epoch campaign of Very Long Baseline Interferometry (VLBI) observations of the radio galaxy 1946+708 using the Very Long Baseline Array and a Global VLBI array. From these high-resolution observations, we deduce the kinematic age of the radio source to be ~4000 years, comparable with the ages of other Compact Symmetric Objects. Ejections of pairs of jet components appears to take place on time scales of ten years and these components in the jet travel outward at intrinsic velocities between 0.6c and 0.9c. From the constraint that jet components cannot have intrinsic velocities faster than light, we derive H 0 > 57 km s–1 Mpc–1 from the fastest pair of components launched from the core. We provide strong evidence for the ejection of a new pair of components in ~1997. From the trajectories of the jet components, we deduce that the jet is most likely to be helically confined, rather than being purely ballistic in nature.
dc.language.isoen
dc.publisherAmerican Astronomical Society
dc.subjectradio continuum: galaxies
dc.subjectdistance scale
dc.subjectgalaxies: active
dc.subjectgalaxies: individual: 1946+708
dc.subjectgalaxies: jets
dc.title.enMonitoring the Bidirectional Relativistic Jets of the Radio Galaxy 1946+708
dc.typeArticle de revue
dc.identifier.doi10.1088/0004-637X/698/2/1282
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP]
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP]
dc.identifier.arxiv0904.1879
bordeaux.journalThe Astrophysical Journal
bordeaux.page1282-1291
bordeaux.volume698
bordeaux.issue2
bordeaux.peerReviewedoui
hal.identifierhal-00402767
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00402767v1
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