VLBI Polarimetry of 177 Sources from the Caltech–Jodrell Bank Flat‐Spectrum Survey
- 1 June 2003
- journal article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 589 (2) , 733-751
- https://doi.org/10.1086/374712
Abstract
We present VLBA observations and a statistical analysis of 5 GHz VLBI polarimetry data from 177 sources in the Caltech-Jodrell Bank flat-spectrum (CJF) survey. The CJF survey, a complete, flux-density-limited sample of 293 extragalactic radio sources, gives us the unique opportunity to compare a broad range of source properties for quasars, galaxies and BL Lacertae objects. We focus primarily on jet properties, specifically the correlation between the jet axis angle and the polarization angle in the core and jet. A strong correlation is found for the electric vector polarization angle in the cores of quasars to be perpendicular to the jet axis. Contrary to previous claims, no correlation is found between the jet polarization angle and the jet axis in either quasars or BL Lac objects. With this large, homogeneous sample we are also able to investigate cosmological issues and AGN evolution.Comment: Accepted to the Astrophysical Journal: 37 pages, 14 figureKeywords
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This publication has 34 references indexed in Scilit:
- The nature of compact parsec-scale knots in AGN: clues from their polarisation propertiesNew Astronomy Reviews, 2003
- Parsec‐Scale Blazar Monitoring: Flux and Polarization VariabilityThe Astrophysical Journal, 2002
- Relation between radio core length and black hole mass for active galactic nucleiMonthly Notices of the Royal Astronomical Society, 2002
- Analysis of = 6 cm VLBI polarization observations of a complete sample of northern BL Lacertae objectsMonthly Notices of the Royal Astronomical Society, 2000
- Flashing Superluminal Components in the Jet of the Radio Galaxy 3C120Science, 2000
- The Second Caltech--Jodrell Bank VLBI Survey. II. Observations of 102 of 193 SourcesThe Astrophysical Journal Supplement Series, 1995
- Milliarcsecond Polarization Structure of 24 Objects from the Pearson-Readhead Sample of Bright Extragalactic Radio Sources. II. DiscussionThe Astrophysical Journal, 1993
- Unified Models for Active Galactic Nuclei and QuasarsAnnual Review of Astronomy and Astrophysics, 1993
- Statistical methods for astronomical data with upper limits. II - Correlation and regressionThe Astrophysical Journal, 1986
- Statistical methods for astronomical data with upper limits. I - Univariate distributionsThe Astrophysical Journal, 1985