Astrometry & photometry for CMa R1 members

An exotic environment surrounds the young stellar groups associated with the Canis Major (CMa) OB1/R1 region, which probably was formed under feedback from at least three...与大犬座（Canis Major，缩写CMa）OB1/R1星区相关联的年轻恒星群所处的环境极为特殊，该星区大概率是在至少三次……的反馈作用下形成的。