Evolutionary tracks at Zinit = 0.006 (in blue, hot tracks) and 0.040 (in red, cool tracks). Only selected stellar masses are plotted for clarity, as labeled next to the ZAMS location of the low-metallicity grid. The main sequences are drawn in thin continuous lines and the post-main sequences in thin dotted lines. Thick continuous lines denote the location of the ZAMS (hot sides) and of the onset of the RGB (cool sides). Also shown for each of the two metallicity grids are the isochrones at 13.5 Gyr (thick dashed lines on the low-luminosity side).
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