Polarized Radio Sources: A Study of Luminosity, Redshift and Infrared Colors

Abstract

The Dominion Radio Astrophysical Observatory Deep Field polarization study has been matched with the Spitzer Wide-Area Infrared Extragalactic survey of the European Large Area Infrared Space Observatory Survey North 1 field. We have used VLA observations with a total intensity rms of 87 microJy beam^-1 to match SWIRE counterparts to the radio sources. Infrared color analysis of our radio sample shows that the majority of polarized sources are elliptical galaxies with an embedded active galactic nucleus. Using available redshift catalogs, we found 429 radio sources of which 69 are polarized with redshifts in the range of 0.04 < z <3.2. We find no correlation between redshift and percentage polarization for our sample. However, for polarized radio sources, we find a weak correlation between increasing percentage polarization and decreasing luminosity.

35 pages, 12 figures, accepted for publication in The Astrophysical Journal

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• ATLAS 1.4 GHz Data Release 2 -- II. Properties of the faint polarized sky
• The impact of polarized extragalactic radio sources on the detection of CMB anisotropies in polarization
• Infrared-Faint Radio Sources: A New Population of High-redshift Radio Galaxies
• Deep Spitzer observations of infrared-faint radio sources: high-redshift radio-loud AGN?
• Deep GMRT 610 MHz Observations of the ELAIS N1 Field : Catalogue and Source Counts
• Statistics of the fractional polarisation of compact radio sources in Planck maps
• The Magnetic Field and Polarization Properties of Radio Galaxies in Different Accretion States
• Radio galaxies and their magnetic fields out to z <= 3
• J1615+5452: a remnant radio galaxy in the ELAIS-N1 field
• The radio spectral energy distribution of infrared-faint radio sources
• The Evolution of the Low-Frequency Radio AGN Population to $z\simeq 1.5$ in the ELAIS N1 Field
• On the nature of infrared-faint radio sources in the SXDF and VLA-VVDS fields
• Infrared-Faint Radio Sources in the SERVS deep fields: Pinpointing AGNs at high redshift
• Active galactic nuclei cores in infrared-faint radio sources: Very long baseline interferometry observations using the Very Long Baseline Array
• Infrared-faint radio sources remain undetected at far-infrared wavelengths. Deep photometric observations using the Herschel Space Observatory
• Optically Faint Radio Sources: Reborn AGN?
• From Nearby Low Luminosity AGN to High Redshift Radio Galaxies: Science Interests with SKA
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