Residual as a function of the axial ratio of the Sérsic component from Sérsic+PSF models. The points denote nucleated (violet) and non-nucleated (green) galaxies within the stellar mass range of 10^6.2 < M_* < 10^7.8. The purple line shows the linear fit to the nucleated galaxies. The upper and left sub-plots show the distributions of the axial ratio and residual , respectively.