Continued Exploration of the Nucleosynthesis of Core Collapse Supernovae

核心塌陷超新星核合成的继续探索

• 批准号: 0653376
• 负责人: William Hix
• 金额: $ 24.35万
• 依托单位: University of Tennessee Knoxville
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-01 至 2011-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0653376&HistoricalAwards=false
• 关键词: Continued; Exploration; Nucleosynthesis; Core; Collapse

In addition to being among the most energetic of astrophysical events, core collapse supernovae are the most productive factories of the heavy elements that are necessary for life. As a result, they are critical players in the origin and evolution of the chemical elements. Supernovae have been, and continue to be, objects of great interest to a wide range of astronomical, nuclear and particle physics experiments and observatories, from radio and optical telescopes to nuclear accelerators and neutrino and gravity wave detectors. Here Dr. Hix will continue efforts toward improving our understanding of the nucleosynthesis that results when a core collapse supernova explodes. This work builds on previous NSF-supported efforts and is complementary to Department of Energy funded research into the core collapse supernovae mechanism occurring at Oak Ridge National Laboratory. Efforts in recent years have shown that the details of the supernova mechanism can have a large impact on the composition and distribution of supernova ejecta. Since many of the important observations of supernovae highlight the elemental composition, accurate calculation of the nucleosynthesis is essential. Realistic nucleosynthesis can only be calculated in a self-consistent multi-dimensional fashion, quite different from current parameterized one-dimensional models. Therefore a series of investigations into the nucleosynthesis of such models will be conducted with the ultimate goal of self consistent nucleosynthesis, calculated within the neutrino radiation hydrodynamic models. Dr. Hix will continue giving public lectures on this topic as well as participating in the development of a Nuclear Astrophysics exhibit at the American Museum of Science and Engineering in Oak Ridge, TN. Two graduate students will also be supported and trained in supernova research and provided with access to the world class scientific environment at Oak Ridge National Laboratory. It is also expected that undergraduate students will be involved in this research during the summer (supported by the state of Tennessee).

除了是最具活力的天体物理事件之一，核心坍缩超新星是生命所必需的重元素的最具生产力的工厂。 因此，它们在化学元素的起源和演化中发挥着关键作用。 超新星一直是并将继续是从射电和光学望远镜到核加速器和中微子及重力波探测器等一系列天文、核和粒子物理实验和观测站极为感兴趣的物体。 在这里，Hix博士将继续努力提高我们对核心坍缩超新星爆炸导致的核合成的理解。 这项工作建立在以前的NSF支持的努力，是补充能源部资助的研究核心崩溃超新星机制发生在橡树岭国家实验室。 近年来的努力表明，超新星机制的细节可以对超新星喷出物的组成和分布产生很大的影响。 由于许多重要的超新星观测都强调元素组成，因此精确计算核合成是必不可少的。 现实的核合成只能以自洽的多维方式计算，与当前的参数化一维模型截然不同。 因此，一系列的调查，这些模型的核合成将进行与自洽核合成的最终目标，中微子辐射流体动力学模型内计算。Hix博士将继续就这一主题发表公开演讲，并参与田纳西州橡树岭美国科学与工程博物馆核天体物理学展览的开发。 两名研究生还将得到超新星研究方面的支助和培训，并在橡树岭国家实验室获得世界一流的科学环境。 预计本科生将在夏季参与这项研究（由田纳西州支持）。