Top: the g − i color vs. stellar mass for the z sample (the spectroscopically confirmed supercluster members). Bottom: log sSFR vs. M ⋆ for the same z sample, AGNs excluded. The dash-dotted line represent the expected sSFR vs. M ⋆ relation for a 24 μm source of 0.2 mJy flux density (i.e. at the completeness limit of our Spitzer survey), obtained using the relations of Lee et al. (2010) and Kennicutt (1998). The dashed line is the relation of Oliver et al. (2010) for galaxies from the Spitzer Wide-area InfraRed Extragalactic Legacy Survey in the redshift range 0.2 < z < 0.3. In both panels, symbols have the same meaning as in Fig. 6.
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