Mark SARGENT
(MPIA )
Because the radio-IR relation is commonly used as a tracer of obscured star formation in galaxies in a wide range of environments, it is vital to determine whether it holds out to high redshifts where the cosmic star formation rate density peaks.
I will present our latest results on the evolution of the IR/radio properties of radio- and an IR-selected COSMOS sources at z<1.5. Thanks to the tools of survival analysis (the statistical treatment of upper flux limits) we are able to incorporate the information from detections and non-detections, both in the IR and at radio wavelengths. Doing so eliminates a potential source of bias in evolutionary studies which have frequently only dealt with sources detected at both wavelengths.