Left: redshift versus M_* of the member galaxies we selected. The stellar mass lower than 10⁹M_⊙ is not complete to a redshift of 0.06. The dashed purple line shows the stellar mass for a target with r = 20 AB mag and g − r = 0.5 at each redshift, which is roughly the detection limit of the DESI spectroscopic sample. Right: histogram of the stellar mass at different R/R₂₀₀. The stellar mass distributions for galaxies at different radii are similar.