An Intensive Search for r-process-Enhanced Stars, and Abundance Patterns in the Early Galaxy

对 r 过程增强恒星和早期星系丰度模式的深入研究

• 批准号: 0406784
• 负责人: Timothy Beers
• 金额: $ 31.4万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-07-15 至 2007-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0406784&HistoricalAwards=false
• 关键词: Intensive; Search; process; Enhanced; Stars

An Intensive Search for r-process-Enhanced Stars, and Abundance Patterns in the Early GalaxyABSTRACTAST 0406784 Timothy BeersDr. Timothy Beers, at Michigan State University, will undertake a program to complete a large-scale search for very metal-poor stars in the halo of the Galaxy that, based on a rapid sequence of neutron absorptions in nuclear reactions, are referred to as highly "rapid-process-enhanced", or "r-process-enhanced" stars. Highly r-process-enhanced, very metal-poor stars provide a means to investigate the nature of the r-process itself in the early Galaxy, the sites for the production of the r-process elements and the age of the Galaxy. This latter effort is significant because the PI uses a method that is independent of precise knowledge of stellar evolution, chemical evolution of the Galaxy, and cosmological models. The proposal also seeks support for the analysis of the chemical elemental abundances for the large sample of low metallicity giants that are the candidates for the search. The research will have broad impact on a number of research areas, including astronomy, nuclear physics, and chemistry. Opportunities for traini

对早期银河系中r过程增强恒星和Abdominal图案的密集搜索。密歇根州立大学的Timothy Beers将开展一项计划，以完成对银河系晕中金属含量非常低的恒星的大规模搜索，这些恒星基于核反应中的快速中子衰变序列，被称为高度“快速过程增强”或“r过程增强”恒星。 高度r过程增强，非常贫金属的恒星提供了一种手段，以调查的性质，r过程本身在早期的银河系，网站的生产r过程的元素和银河系的年龄。 后者的努力是重要的，因为PI使用的方法是独立于恒星演化，银河系的化学演化和宇宙学模型的精确知识。 该提案还寻求支持分析作为搜寻候选者的大量低金属量巨星的化学元素丰度。 这项研究将对天文学、核物理学和化学等多个研究领域产生广泛影响。 培训机会