Figure 7: Correlations between the bulge parameters for a sample of lenticulars and early-type spirals. Correlation between the Hubble type and effective radius (a), effective surface brightness (b), and Sérsic parameter (c). Correlations between the effective radius of the bulge and the Sérsic parameter (d), effective surface brightness (e), and absolute magnitude (f). The full line represents the best linear fit. The Pearson correlation coefficient () is also indicated. See  for more details.