Identifying multiple populations in M71 using CN

We have observed their cyanogen CN features at ~3800 and 4120{AA} as well as the CH band at ~4300{AA} for 145 evolved stars in the Galactic globular cluster M71 using the...我们针对银河系球状星团M71中的145颗演化恒星开展了观测，捕捉到其氰（CN）在约3800埃（Å）与4120埃（Å）处的特征，以及约4300埃（Å）处的CH分子带，观测过程使用了……