New PMS K/M Stars in Upper Scorpius

We present 237 new spectroscopically confirmed pre-main-sequence K- and M-type stars in the young Upper Scorpius subgroup of the Sco-Cen association, the nearest region of...我们报道了天蝎-半人马星协（Sco-Cen association）年轻天蝎上部子群（Upper Scorpius subgroup）中，经光谱证认的237颗新K型与M型主序前星（pre-main-sequence stars），该星协是……中距离最近的区域。