Collaborative Research: Abundance Patterns in Extremely Metal-poor Stars: SNII, Pop III and the Early Galaxy

AST-0607770研究：加州大学圣克鲁兹分校：Michael BolteTITLE：合作研究：极端贫金属星中的丰度模式：SNII、POP III和早期银河ABSTRACTDR加州大学圣克鲁斯分校的迈克尔·博尔特和俄亥俄州立大学的詹妮弗·约翰逊博士将开展一个项目，通过使用极度贫金属(EMP)恒星中的化学丰度来解决几个基本的天体物理问题。该提议的主要目标是a)通过中分辨率光谱安全地识别其中一些恒星的丰度并初步绘制其丰度图，b)进行后续高分辨率观测以进行详细的化学丰度图，以便约束超新星核合成的模型并深入了解恒星早期的富集性，c)使用高分辨率近紫外线光谱对球状星团巨星中的元素进行调查，以改进根据核计时技术估计的年龄，以及d)确定电磁脉冲恒星的双星比例，以确定早期碳富集源(S)。博士后研究人员，研究生和本科生将完成大部分拟议的工作。元素起源的主题将用于吸引普通公众，并将用于加强初中和高中的科学教育。博尔特博士和约翰逊博士将继续进行公开演讲，并与当地7-12个科学班合作。最后，凯克望远镜光谱将通过公共网站免费提供，使数据可用于研究和教育目的。

AST-0607770INSTITUTION: University of California, Santa CruzPI: Michael BolteTITLE: Collaborative Research: Abundance Patterns in Extremely Metal-poor Stars: SNII, Pop III and the Early GalaxyABSTRACTDr. Michael Bolte at the University of California, Santa Cruz, and Dr. Jennifer Johnson at the Ohio State University, will undertake a program that addresses several fundamental astrophysical issues by the use of chemical abundances in extremely metal-poor (EMP) stars. The main goals of the proposal are to a) securely identify and initially map the abundances of some of these stars by means of moderate-resolution spectroscopy, b) perform follow-up high-resolution observations to carry out detailed chemical abundance mapping, in order to constrain models of supernovae nucleosynthesis and provide insight into early stellar enrichment, c) conduct a survey of elements in globular cluster giant stars using high resolution near-ultraviolet spectra, in order to improve age estimates from nuclear chronometry" techniques, and d) determine the binary star fraction of EMP stars to determine the source(s) of Carbon enrichment at early times.Post-doctoral researchers, graduate students and undergraduates will carry much of the proposed work out. The topic of the origin of the elements will be used to engage the general public and will be used to enhance middle and high school science education. Dr. Bolte and Dr. Johnson will continue to present public talks and to work with local 7-12 science classes. Finally, the Keck-telescope spectra will be freely available by means of a public web site, making the data available for research and educational purposes.