Massive Stellar Evolution, Supernovae, and Nucleosynthesis

大规模恒星演化、超新星和核合成

• 批准号: 9731569
• 负责人: Stanford Woosley
• 金额: $ 36.04万
• 依托单位: University of California-Santa Cruz
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-07-01 至 2002-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9731569&HistoricalAwards=false
• 关键词: Massive; Stellar; Evolution; Supernovae; Nucleosynthesis

Woosley, Stanford AST 97-31569 Dr. Woosley will continue his program of research into the origin and evolution of chemical elements, the evolution of massive stars, and the mechanisms and outcome of supernovae explosions. He will make a number of improvements to his stellar evolution model, including updated opacities and nuclear reaction rates, improved nuclear reaction networks, the incorporation of effects of mass loss and rotation, and a more thorough treatment of convection and mixing. With these improved model results he will explore the sensitivities of the supernovae explosion properties to the pre-supernova model. He also will study the physics of flame propagation and detonation in degenerate white dwarf stars to develop a better understanding of Type Ia supernovae. In all cases, he will determine the detailed nucleosynthesis, with the continued goal of understanding the origin and evolution of the elements. This suite of investigations has direct application to many related areas of research, such as galactic chemical evolution, the distance scale in the universe, gamma-ray astronomy, isotopic anomalies in meteorites, and particle astrophysics. ***

伍斯利博士将继续他对化学元素的起源和演化、大质量恒星的演化以及超新星爆炸的机制和结果的研究计划。他将对他的恒星演化模型进行一些改进，包括更新不透明度和核反应速率，改进核反应网络，纳入质量损失和自转的影响，以及更彻底地处理对流和混合。有了这些改进的模型结果，他将探索超新星爆炸特性对前超新星模型的敏感性。他还将研究简并白矮星中的火焰传播和爆轰物理，以更好地理解Ia型超新星。在所有情况下，他都将确定详细的核合成，并继续以了解元素的起源和进化为目标。这套研究直接应用于许多相关的研究领域，如星系化学演化、宇宙中的距离尺度、伽马射线天文学、陨石中的同位素异常和粒子天体物理。***