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

Show simple item record Gabuzda, Denise Chernetskii, V. A. 2017-11-07T09:38:59Z 2017-11-07T09:38:59Z 2003
dc.identifier.citation Gabuzda, 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.x en
dc.identifier.volume 339
dc.identifier.issued 3
dc.identifier.startpage 669
dc.identifier.endpage 679
dc.identifier.issn 0035-8711
dc.identifier.doi 10.1046/j.1365-8711.2003.06204.x
dc.description.abstract We 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.sponsorship Fifth Framework Programme (IHP Programme (ARI) contract No. HPRI-CT-1999-00045)
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Oxford University Press en
dc.rights © 2003, Royal Astronomical Society en
dc.subject Polarization en
dc.subject Radio continuum en
dc.subject Galaxies en
dc.title Parsec-scale Faraday rotation distribution in the BL Lac object 1803+784 en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Denise Gabuzda, Physics, University College Cork, Cork, Ireland. +353-21-490-3000 Email: en
dc.internal.availability Full text available en
dc.description.version Published Version en
dc.contributor.funder Fifth Framework Programme
dc.description.status Peer reviewed en
dc.identifier.journaltitle Monthly Notices of the Royal Astronomical Society en
dc.internal.IRISemailaddress en

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