HIGHLIGHTS
SUMMARY
Wang et_al used their MESA isochrones with different rotational velocities to fit cluster split MSs, but they neither compared them with other stellar models nor compared them with the recent spectroscopic velocity measurements of cluster stars. The authors derive the rotational velocity of the red and blue MS stars in young star clusters by comparing their observed color split with the rotationally induced color variation in stellar models. If the initial rotational velocity for the red MS stars can be as high as 65% of their critical values, single star evolution is able to . . .
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