Parsec-scale Faraday rotation distribution in the BL Lac object 1803+784

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dc.contributor.authorGabuzda, Denise
dc.contributor.authorChernetskii, V. A.
dc.contributor.funderFifth Framework Programme
dc.date.accessioned2017-11-07T09:38:59Z
dc.date.available2017-11-07T09:38:59Z
dc.date.issued2003
dc.description.abstractWe present the results of VLBI polarization observations of the BL Lac object 1803+784 made simultaneously at 22, 15, 8 and 5 GHz in 1997 April, and quasi-simultaneously at 1.6 and 5 GHz in 1998 July. These data have yielded the total intensity, polarization, spectral-index, and rotation-measure distributions on scales from less than 1 mas to about 30 mas from the core (from a projected distance of about 1-150 pc at the redshift of 1803+784). There is an enhancement in the rotation measure for the VLBI core, clearly due to plasma in the immediate vicinity of the AGN. The rotation measures 10-30 mas from the core demonstrate that the Galactic contribution to the total observed rotation measures is equal to the previously reported integrated rotation measure (-61 rad m(-2) ). After subtracting this Galactic contribution and multiplying by (1 +z )(2) , the rotation measure for the VLBI core in the source rest frame is about 500 rad m(-2), similar to the VLBI core rotation measures reported previously for BL Lac and several quasars.en
dc.description.sponsorshipFifth Framework Programme (IHP Programme (ARI) contract No. HPRI-CT-1999-00045)
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationGabuzda, D. C. and Chernetskii, V. A. (2003) 'Parsec-scale Faraday rotation distribution in the BL Lac object 1803+784', Monthly Notices of the Royal Astronomical Society, 339(3), pp. 669-679. doi: 10.1046/j.1365-8711.2003.06204.xen
dc.identifier.doi10.1046/j.1365-8711.2003.06204.x
dc.identifier.endpage679
dc.identifier.issn0035-8711
dc.identifier.issued3
dc.identifier.journaltitleMonthly Notices of the Royal Astronomical Societyen
dc.identifier.startpage669
dc.identifier.urihttps://hdl.handle.net/10468/4989
dc.identifier.volume339
dc.language.isoenen
dc.publisherOxford University Pressen
dc.relation.urihttps://academic.oup.com/mnras/article-lookup/doi/10.1046/j.1365-8711.2003.06204.x
dc.rights© 2003, Royal Astronomical Societyen
dc.subjectPolarizationen
dc.subjectRadio continuumen
dc.subjectGalaxiesen
dc.titleParsec-scale Faraday rotation distribution in the BL Lac object 1803+784en
dc.typeArticle (peer-reviewed)en
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