Physical and wind properties of hot luminous. stars with ULLYSES

虽然大质量恒星在恒星形成星系的辐射、机械和化学反馈中占主导地位，但它们非常罕见。金属贫乏的大质量恒星尤其重要，因为它们被认为是LIGO/VIRGO/KAGRA引力波合并的祖先，可以在遥远的恒星形成星系的静止框架紫外光中看到它们。该项目旨在利用一个新的HST遗产项目ULLYSES，该项目正在获得数百颗金属贫乏的大质量恒星的高质量紫外光谱，从中获得物理，化学和风的特性，允许改进大质量恒星的质量损失公式，包括与银河系对应的金属丰度在驱动风中的作用，这直接影响了它们作为核心坍缩超新星的最终命运。

Massive stars are rare, though dominate the radiative, mechanical and chemical feedback in star-forming galaxies. Metal-poor massive stars are especially important since they are believed to be the progenitors of LIGO/VIRGO/KAGRA gravitational wave mergers and can be seen collectively in the rest-frame UV light of distant star-forming galaxies. This project seeks to exploit a major new HST Legacy programme ULLYSES which is obtaining high quality UV spectroscopy of hundreds of metal-poor massive stars, from which physical, chemical and wind properties will be obtained, allowing refinements to mass-loss prescriptions for massive stars, including the role of metallicity in driving winds from comparison with Galactic counterparts, which directly influences their ultimate fate as core collapse supernovae.