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Fig. 12.

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M/L vs. M projection of the FP in the SDSS r′-band, i.e. the relation log(Ms/Ls) = log(M/Lr) vs. log Ms, where log Ms is the stellar mass enclosed within the half-light radius, in units of 1012M and calculated according to Bell et al. (2003; left) and Gallazzi et al. (2005; right). Lr is the r′ luminosity enclosed within the half light radius. The small dots in both panels are the data from the catalog by Bernardi et al. (2010; priv. comm.), whose linear fit is shown as a continuous line. The big filled circles refer to our sets of models (12 models × 3 projection planes = 36 models) and the best fit of the intermediate and high mass models is shown as a dashed line. The dispersion of the models along the vertical axis, in particular for the high mass ones, is mainly due to their different initial conditions.

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