Three isotopologues CO survey of Molecular Clouds in the CMa OB1 complex

Ze-Hao Lin, Yan Sun, Ye Xu +2

Using the Purple Mountain Observatory 13.7-m millimeter telescope at Delingha in China, we have conducted a large-scale simultaneous survey of ${}^{12}$CO, ${}^{13}$CO, and \xxco ($J$…