The SFH is represented here by the fraction of stellar mass formed in each epoch, m(t), averaged over different M⋆ (upper panels) and Hubble type (bottom) bins. Left, middle, and right panels show the average m(t) curves for different regions in the galaxy: the whole galaxy (left), the inner regions (middle), and the outer regions (right). The shaded bands around the mean curves represent ± the error in the mean, computed as the rms dispersion of the corresponding m(t) values divided by the square root of the number of galaxies in each bin.
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