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The DRAO Planck Deep Fields: the polarization properties of radio galaxies at 1.4 GHz by Grant, Julie; Taylor, Russ; Stil, Jeroen; Landecker, Tom; Kothes, Roland; Ransom, Ryan; Scott, Douglas is a scholarly article available to read on EtoBox.

What is The DRAO Planck Deep Fields: the polarization properties of radio galaxies at 1.4 GHz about?

We present results of deep polarization imaging at 1.4 GHz with the Dominion Radio Astrophysical Observatory as part of the DRAO Planck Deep Fields project. This deep extragalactic field covers 15.16 square degrees centered at RA = 16h 14m and DEC = 54d 56', has an angular resolution of 42" x 62" at the field center, and reaches a sensitivity of 55 microJy/beam in Stokes I and 45 microJy/beam in Stokes Q and U. We detect 958 radio sources in Stokes I of which 136 are detected in polarization. We present the Euclidean-normalized polarized differential source counts down to 400 microJy. These counts indicate that sources have a higher degree of fractional polarization at fainter Stokes I flux density levels than for brighter sources, confirming an earlier result. We find that the majority of our polarized sources are steep-spectrum objects with a mean spectral index of -0.77, and there is no correlation between fractional polarization and spectral index. We also matched deep field sources to counterparts in the Faint Images of the Radio Sky at Twenty Centimeters catalogue. Of the polarized sources, 77% show structure at the arc-second scale whereas only 38% of the sources with no det

Author

Grant, Julie; Taylor, Russ; Stil, Jeroen; Landecker, Tom; Kothes, Roland; Ransom, Ryan; Scott, Douglas

Published

2010

Language

EN