A Cyberinfrastructure platform to meet the needs of data intensive radio astronomy on route to the SKA

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

  • csiro, marsfield, australia

Julie Banfield

  • university of birmingham, b15 2tt

Samuel George

  • canada, alberta, calgary

Russ Taylor

  • university of calgary

Jeroen Stil

  • penticton, bc, canada

Roland Kothes

Douglas Scott



Year: 2011

Volume: 733

Pages: 69-81



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.