[82.04] The Mid- and Far-infrared/Radio Correlations in the Spitzer First Look Survey

AAS 204th Meeting, June 2004
Session 82 Star Formation and Early Results from Spitzer
Oral, Thursday, June 3, 2004, 10:00-11:30am, 603/605/607

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[82.04] The Mid- and Far-infrared/Radio Correlations in the Spitzer First Look Survey

P. Appleton, D. Fadda, F. Marleau, D. Frayer, G. Helou, P. Choi, L. Yan, M. Lacy, L. Armus, L. J. Storrie-Lombardi (SSC-Caltech), J. J. Condon (NRAO), S. Chapman (Caltech), M. Im (SNU)

Using the Spitzer Space Telescope and the VLA, we present the first direct evidence that the well-known far-IR/radio correlation, and the less well correlated Mid-IR/radio correlation extend to cosmologically significant redshifts. We explore the dependence of q = logS_IR/S_radio on z. The results were obtained by matching Spitzer sources at 24 and 70\mum with VLA micro-Jy radio sources for the full 4 sq. degree field of the Spitzer FLS. Spectroscopic redshifts have been obtained for ~ 500 matched IR/radio sources using WIYN, Keck and archival SDSS spectra. We find strong evidence for the universality of the far-IR/radio correlation out to z = 2.

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