Fig. 6.
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Relation of D4000 vs. z (top panel) and Mstar vs. z (bottom panel). The grey points represent the 77 red nuggets and the red squares represent the median value in every redshift bin (see Table 4). The red line is the best linear fit. The dashed orange line represents D4000 equals 1.55, which is the passiveness limit derived by Kauffmann et al. (2003a) in the local Universe.
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