Physical and wind properties of hot luminous. stars with ULLYSES

热发光的物理和风属性。

• 批准号: 2745664
• 金额: --
• 依托单位: University of Sheffield
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2745664
• 关键词: Physical; wind; properties; hot; luminous.

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.

大质量恒星是罕见的，但在恒星形成星系中主导着辐射，机械和化学反馈。贫金属的大质量恒星特别重要，因为它们被认为是LIGO/VIRGO/KAGRA引力波合并的祖先，并且可以在遥远的恒星形成星系的静止框架紫外光中集体看到。该项目旨在利用一个新的大型HST遗产计划ULLYSES，该计划正在获得数百颗贫金属大质量恒星的高质量紫外光谱，从中将获得物理，化学和风的特性，从而可以改进大质量恒星的质量损失处方，包括与银河系同行相比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。