${}^{18}$O${/}^{17}$O abundance ratio toward a sample of massive star forming regions with parallax distances

Chao Ou, Junzhi Wang, Siqi Zheng +3

The ${}^{18}$O${/}^{17}$O abundance ratio is, in principle, a powerful tool to estimate the relative contributions of massive stars and low- to intermediate-mass stars to the chemical…