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Previous observational studies of the infrared (IR)-radio relation out tohigh redshift employed any detectable star forming systems at a given redshiftwithin the restricted area of cosmological survey fields. Consequently, theevolution inferred relies on a comparison between the average IR/radioproperties of (i) very IR-luminous high-z sources and (ii) more heterogeneouslow(er)-z samples that often lack the strongest IR emitters. In this report weconsider populations of objects with comparable luminosities over the last 10Gyr by taking advantage of deep IR (esp. Spitzer 24 micron) and VLA 1.4 GHzobservations of the COSMOS field. Consistent with recent model predictions,both Ultra Luminous Infrared Galaxies (ULIRGs) and galaxies on the bright endof the evolving IR luminosity function do not display any change in theiraverage IR/radio ratios out to z~2 when corrected for bias. Uncorrected datasuggested ~0.3 dex of positive evolution.

No Evolution in the IR-Radio Relation for IR-Luminous Galaxies at z<2 in the COSMOS Field