Evolution of the main sequence of star forming galaxies resulting from the SOM-based measurement of the SXDF2018 catalog. Redshift bins are chosen to correspond to four time steps separated by ∼2 Gyr, whose color is indicated in the legend along with median redshift and cosmic age. In each bin, the main sequence is identified as the most prominent overdensity in the SFR_SOM − M_SOM plane (shaded areas representing density contours). Each overdensity peak is fit by Eq. (8) either independently (solid lines) or simultaneously at all t (dashed lines).