Distance from the average f_obs–M_* relation as a function of (left) the spatial offset at the central position between UV and dust emission, (middle) the size ratio between UV and dust emission, and (right) the surface density of L_IR. Galaxies without clear main UV components and without dust continuum detection at < 4σ are not shown. Based on the Spearman correlation coefficients and p-values, f_obs has a correlation with the UV-dust spatial offset and Σ_IR. On the other hand, there is no correlation between f_obs and the size ratio between UV and dust emission.