Fig. 12
Mean star formation histories of different types of LRGs. The SFH of a galaxy is represented by the mass ratio of stars formed per Gyr around any given lookback time t to the total stellar mass. The solid green, red, and blue histograms represent the mean value of the mass growth history for BCGs, MGs, and FGs obtained from a semi-analytical model (Guo et al. 2011), respectively; the dotted histograms are obtained from the full spectrum fitting for the SDSS BCGs, MGs, and FGs, respectively.
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