r-band B/T distribution of our sample extracted from S11. We divided them by several mass ranges. Each distribution is normalized by the total number of galaxies in each mass range, respectively. The distribution stretches down to B/T ∼ 0.4 even in the most massive regime, but we note that the B/T presented in S11 is not an ideal indicator of “genuine” B/T for all galaxies. In some cases, bulge and disk components are not real bulge and disk, but just a mathematical representation of the surface brightness profiles. See Appendix A for details.