Distribution of the N2GN galaxies, their luminosity, and dust mass as a function of redshift. Top panel: Redshift distribution. The filled histogram includes the sources with spectroscopic redshift, while the open histogram includes all sources. Second panel: Infrared luminosity of the star forming component, integrated between 8 and 1000 μm. The blue solid line represents the expected luminosity for a source of 0.7 mJy in the NIKA2 1.2 mm band, assuming its emission is described by the median SED shown in the left panel of Fig. 5. The shaded area is given by the best fit models of all sources. Third: 850 μm monochromatic luminosity. Bottom panel: Dust mass distribution as a function of redshift. The dashed and dotted lines represent the minimum dust mass and maximal-completeness dust mass obtained rescaling the L₈₅₀ versus z line adopting the minimum and maximum M_dust/L₈₅₀ ratio in the sample (Sect. 6.1).