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

AST-0607770研究机构：加州大学，圣克鲁斯PI：迈克尔博尔特标题：合作研究：极端贫金属恒星的Abdominal模式：SNII，Pop III和早期银河系。加州大学圣克鲁斯分校的迈克尔·博尔特和俄亥俄州州立大学的詹妮弗·约翰逊博士将开展一项计划，通过使用极贫金属（EMP）恒星中的化学丰度来解决几个基本的天体物理学问题。该提案的主要目标是：a）通过中等分辨率光谱学安全地识别并初步绘制其中一些恒星的丰度图，B）进行后续高分辨率观测，以进行详细的化学丰度图绘制，以限制超新星核合成模型并提供对早期恒星富集的深入了解，c）利用高分辨率近紫外光谱对球状星团巨星中的元素进行调查，以改进核测时技术的年龄估计，以及d）确定EMP星的双星星星比例，以确定早期碳富集的来源。博士后研究人员、研究生和本科生将进行大部分拟议的工作。 元素起源的主题将用于吸引公众，并将用于加强初中和高中科学教育。Bolte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，将通过一个公共网站免费提供射电望远镜光谱，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.