Magnetism in massive stars

大质量恒星代表着宇宙中最热、最明亮的恒星成分，是锻造化学元素的熔炉。在它们的一生中，物质、能量和动量通过它们强大的辐射场和恒星风，以及标志着它们死亡的戏剧性超新星爆炸，被注入周围的星际介质。这些快速演化的恒星驱动着星系的化学、结构和演化，主导着宇宙的生态，产生了深远的后果。 大质量恒星的演化从根本上受到其快速自转和质量损失的影响。在磁场存在的情况下，这两种特性都会有相当大的改变。虽然大质量恒星中磁场的存在已经不再是问题，但我们对大质量恒星磁性的基本统计性质的了解严重不完整。我们对场对大质量恒星演化的影响范围的认识存在一个令人不安的不足，而且几乎没有经验基础来理解场如何改变质量损失。最值得注意的是，我们并不清楚这些重要的磁场是如何产生的。 这项提议的目的是在国际大质量恒星磁性(MIMES)项目的背景下资助研究和培训。利用国际天文台和50多个全球合作者的承诺，我们将完成对热的大质量恒星的磁性的全面分析，包括对200颗恒星的调查，以及对20多个原型天体的磁场拓扑和相关物理的详细研究。这个基本的观测数据库将被用来对抗和指导场产生、质量损失和恒星风限制、旋转演化和恒星内部结构和演化的前沿理论模型的发展。

Massive stars represent the hottest and most luminous stellar component of the Universe, and are the crucibles in which the lion's share of the chemical elements are forged. Throughout their lives, matter, energy and momentum are injected into the surrounding interstellar medium by their powerful radiation fields and stellar winds, and by the dramatic supernova explosions that mark their deaths. These rapidly-evolving stars drive the chemistry, structure and evolution of galaxies, dominating the ecology of the Universe with far-reaching consequences. The evolution of a massive star is influenced fundamentally by its rapid rotation and mass loss. Both of these properties are subject to considerable modification in the presence of magnetic fields. Although the existence of magnetic fields in massive stars is no longer in question, our knowledge of the basic statistical properties of massive star magnetism is seriously incomplete. There is a troubling deficit in our knowledge of the scope of the influence of fields on massive star evolution, and almost no empirical basis for understanding how fields modify mass loss. Most remarkably, we have no clear idea how these important magnetic fields originate. The aim of this proposal is to fund research and training within the context of the international Magnetism in Massive Stars (MiMeS) project. Leveraging the commitments of international observatories and over 50 worldwide collaborators, we will complete a comprehensive assay of the magnetic properties of hot, massive stars, including a survey of 200 stars and detailed investigations of the magnetic field topologies and related physics of over 2 dozen prototypical objects. This fundamental observational database will be used to confront and guide development of forefront theoretical models of field generation, mass loss and stellar wind confinement, rotational evolution and stellar interior structure and evolution.