The VLBA Imaging and Polarimetry Survey at 5 GHz

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dc.creatorHelmboldt, J. F.
dc.creatorTaylor, G. B.
dc.creatorTremblay, S.
dc.creatorFassnacht, C. D.
dc.creatorWalker, R. C.
dc.creatorMyers, S. T.
dc.creatorSjouwerman, L. O.
dc.creatorPearson, T. J.
dc.creatorReadhead, A. C. S.
dc.creatorWeintraub, L.
dc.creatorGehrels, N.
dc.creatorRomani, R. W.
dc.creatorHealey, S.
dc.creatorMichelson, P. F.
dc.creatorBlandford, R. G.
dc.creatorCotter, G.
dc.date2006-11-14
dc.date.accessioned2026-07-07T12:29:05Z
dc.date.available2026-07-07T12:29:05Z
dc.descriptionWe present the first results of the VLBA Imaging and Polarimetry Survey (VIPS), a 5 GHz VLBI survey of 1,127 sources with flat radio spectra. Through automated data reduction and imaging routines, we have produced publicly available I, Q, and U images and have detected polarized flux density from 37% of the sources. We have also developed an algorithm to use each source's I image to automatically classify it as a point-like source, a core-jet, a compact symmetric object (CSO) candidate, or a complex source. The mean ratio of the polarized to total 5 GHz flux density for VIPS sources with detected polarized flux density ranges from 1% to 20% with a median value of about 5%. We have also found significant evidence that the directions of the jets in core-jet systems tend to be perpendicular to the electric vector position angles (EVPAs). The data is consistent with a scenario in which ~24% of the polarized core-jets have EVPAs that are anti-aligned with the directions of their jet components and which have a substantial amount of Faraday rotation. In addition to these initial results, plans for future follow-up observations are discussed.
dc.description36 pages, 3 tables, 13 figures; accepted for publication in ApJ
dc.identifierhttps://arxiv.org/abs/astro-ph/0611459
dc.identifierhttp://arxiv.org/abs/astro-ph/0611459
dc.identifierAstrophys.J.658:203-216,2007
dc.identifierdoi:10.1086/511005
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/215756
dc.subjectAstrophysics
dc.titleThe VLBA Imaging and Polarimetry Survey at 5 GHz
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