A high fraction of close massive binary stars at low metallicity

Overview of attention for article published in Nature Astronomy, September 2025

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A high fraction of close massive binary stars at low metallicity. https://t.co/PXtUYvZdq8

#NoritanJournalClub 太陽系の1/5の金属量の小マゼラン銀河中の139個の大質量星 (O-type) の視線速度変化の測定から連星率を推定、観測バイアスも考慮すると7割程度の大質量星は近接連星をなしているという結果に。従来この傾向は高金属量環境でしか確かめられていなかった h…

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