Fig. 15.
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Mean surface brightness within the effective radius (left panel) and within 1 kpc (right panel) vs. stellar mass. The solid black lines in both panels show linear fits to all S4G+ETG galaxies. The dashed red lines in the right panel show fits to only ETGs, separated at log (ℳ*/ℳ⊙) = 10.4 (see text). ETG data points are multicolored, while LTGs are shown in gray.
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