Radio luminosity density log L_1.4 derived for bins of IR luminosity (left panels) and SFR (right panels), with their error bars and best-fitting lines listed in Table 2. Upper limits are shown as arrows corresponding in color to detections (points). The top row refers to NVSS cutouts, and the bottom row shows FIRST cutouts. Non-SFG samples, i.e., samples not cleaned using the Smolčić et al. (2017) criterion (excluded region shown as a shaded interval), show a strong radio luminosity excess at a given SFR due to the presence of RL AGNs.