Radio luminosity at 3 GHz vs. number density per Mpc² of galaxies in COSMOS, in four redshift bins. The density fields are from Scoville et al. (2013). Symbols are the same as in Fig. 4. Circles are objects with radio excess, and squares are objects without radio excess (Delvecchio et al. 2017). The mean values are given by large triangles, along with their standard deviations for the FRIIs (red), FRIs (blue), FRI/FRIIs (green), and COM AGN (black). The bins are selected for a comparison with the literature.