Extending the infrared radio correlation

Abstract

Co-addition of deep (rms about 30 microJy) 20 cm data obtained with the Australia Telescope Compact Array at the location of Spitzer Wide field survey (SWIRE) sources has yielded statistics of radio source counterparts to faint 24 micron sources in stacked images with rms < 1 microJy. We confirm that the infrared-radio correlation extends to f(24micron) = 100 microJy but with a significantly lower coefficient, f (20cm) = 0.039 f(24micron) (or q24 = 1.39) than hitherto reported. We postulate that this may be due to a change in the mean q24 value ratio for objects with f(24micron) < 1mJy.

accepted by mnras Full-resolution version is available on http://www.atnf.csiro.au/people/rnorris/papers/n210.pdf

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