Main sequence of galaxies computed in six different redshift bins: 0.5–1.2, 1.2–1.5, 1.5–2.0, 2.0–3.0, 3.0–4.0, 4.0–6.0. Data of the full sample are reported as blue circles, while the red diamonds represent the final sample (Sect. 4.4) used in our analysis. The black solid line and shaded area indicate the main sequence Speagle et al. (2014; computed at the mean values of the redshift bins) and 1σ dispersion. Finally, the black dashed lines represent the 4x MS, indicative of the starburst regime.