Massive first star binaries as new tools for Galactic archaeology Takuma Suda, Takayuki R. Saitoh, Yuki Moritani, Tadafumi Matsuno and Toshikazu Shigeyama EPJ Web Conf., 260 (2022) 11042 Published online: 24 February 2022 DOI: 10.1051/epjconf/202226011042