Left: Sérsic indices as a function of redshift (see Fig. 13 for color-coding). Right: distribution of the Sérsic indices. All BCGs are represented in the gray histogram. The magenta and cyan histograms represent the distributions obtained with one and two components, respectively, only for the BCGs with appropriate data. The blue and lighter pink histograms represent BCGs observed in too blue filters and with an important inner component, respectively.
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