Observations of BL Lacertae object 1803+784 from the geodetic VLBI archive of the Washington Correlator

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dc.contributor.authorTateyama C.E.
dc.contributor.authorKingham K.A.
dc.contributor.authorKaufmann P.
dc.contributor.authorDe Lucena A.M.P.
dc.date.accessioned2024-03-13T01:46:27Z
dc.date.available2024-03-13T01:46:27Z
dc.date.issued2002
dc.description.abstractWe present 11 maps of BL Lacertae object 1803+784 derived from geodetic VLBI observations archived at the Washington Correlator. The observations were obtained during the years 1988-1999. In this period three superluminal components with an expansion rate of 0.084 mas yr-1 were identified. A remarkable feature of the VLBI images is that the superluminal components only become visible on the jet at a radius of 1 mas from the core, which was interpreted as a result of a helically curved jet. This feature and further evidence of helical patterns found in published high dynamic range VLBI maps at parsec scale and kiloparsec scale enabled us to obtain a well-constrained helical jet. The overall radio morphology of 1803+784 could be described by two dominant components given by a narrow helical jet extending east-west about 6 kpc from the core (deprojected size of 30 kpc) and a much larger north-south component perpendicular to the helical jet (cone axis) with a linear size of about 270 kpc.
dc.description.firstpage496
dc.description.issuenumber2 I
dc.description.lastpage504
dc.description.volume573
dc.identifier.doi10.1086/340749
dc.identifier.issn1538-4357
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/38009
dc.relation.ispartofAstrophysical Journal
dc.rightsAcesso Aberto
dc.subject.otherlanguageGalaxies: jets
dc.subject.otherlanguageRadio continuum: galaxies
dc.subject.otherlanguageTechniques: high angular resolution
dc.subject.otherlanguageTechniques: interferometric
dc.titleObservations of BL Lacertae object 1803+784 from the geodetic VLBI archive of the Washington Correlator
dc.typeArtigo
local.scopus.citations9
local.scopus.eid2-s2.0-0043241737
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=0043241737&origin=inward
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