Collaborative Research: New Models Of Stellar Evolution To Understand The Past, Present & Future Of Magnetic Massive Stars

合作研究：了解过去和现在的恒星演化新模型

• 批准号: 2108455
• 负责人: Veronique Petit
• 金额: $ 54.19万
• 依托单位: University of Delaware
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2108455&HistoricalAwards=false
• 关键词: Collaborative; Research; New; Models; Stellar

Principal Investigators (PIs) Petit, Oksala, and MacDonald will generate computer models to study the formation and evolution of magnetic fields in massive stars. One mystery the PIs hope to solve is whether a strong magnetic field changes the ultimate outcome of a core-collapse supernova. The PIs are members of the Delaware Teachers Institute (DTI) and they will collaborate with K-12 teachers to produce a set of astronomy curriculum units. The mechanism that generates and maintains a magnetic field in massive stars is poorly understood as the stars lack a convective envelope which could drive a dynamo. The team will generate models by implementing the evolution of the magnetic field into stellar evolution codes. They will study how the interplay of fossil fields, stellar winds, convection, and rotation affects the end point, i.e., the formation of neutron stars, black holes, and gravitational wave progenitors. The team will also construct an empirical Initial B-field Function (IBF) based on the current-day properties of known magnetic OB stars to provide a basis for models attempting to explain the origin of magnetism in massive stars.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

首席研究员（PI）Petit，Oksala和MacDonald将生成计算机模型来研究大质量恒星磁场的形成和演化。PI希望解决的一个谜团是，强磁场是否会改变核心坍缩超新星的最终结果。PI是特拉华州教师研究所（DTI）的成员，他们将与K-12教师合作，制作一套天文学课程单元。在大质量恒星中产生和维持磁场的机制知之甚少，因为恒星缺乏可以驱动发电机的对流外壳。该团队将通过将磁场的演化实现为恒星演化代码来生成模型。他们将研究化石场、恒星风、对流和旋转的相互作用如何影响终点，即，中子星、黑洞和引力波前身的形成。该研究小组还将根据目前已知的磁性OB星的性质构建一个经验性的初始B场函数（IBF），为试图解释大质量恒星磁性起源的模型提供基础。该奖项反映了NSF的法定使命，并被认为值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估来支持。