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

对银河系早期的r过程增强恒星和丰度模式的深入研究。密歇根州立大学的蒂莫西·比尔斯将开展一个项目，完成对银河系光晕中非常贫金属的恒星的大规模搜索，这些恒星基于核反应中一系列快速的中子吸收，被称为高度“快速过程增强型”或“r过程增强型”恒星。高度r过程增强的、非常缺乏金属的恒星提供了一种手段来研究银河系早期r过程本身的性质、r过程元素的产生地点和银河系的年龄。后一项工作意义重大，因为PI使用了一种独立于恒星演化、星系化学演化和宇宙学模型的精确知识的方法。该提案还寻求支持对作为搜寻候选者的低金属丰度巨星大样本的化学元素丰度进行分析。这项研究将对天文学、核物理和化学等多个研究领域产生广泛影响。Traini的机遇

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