The Composition of Extrasolar Planetesimals

太阳系外小行星的组成

• 批准号: 1207861
• 负责人: Benjamin Zuckerman
• 金额: $ 24.1万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-09-01 至 2018-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1207861&HistoricalAwards=false
• 关键词: Composition; Extrasolar; Planetesimals

The PI will continue his observational search for evidence of asteroids accreting onto white dwarfs, which is motivated by previously observed abundance anomalies in white dwarf spectra. He will use the Keck Observatory to obtain spectra of disks around white dwarfs that he and a graduate student will analyze. The results will be used to constrain models of planetary formation. This work is likely to have broader impacts to fields of cosmochemistry, planetary science and stellar evolution. This project will also help train a graduate student in research who is participating in an outreach program with China.

PI将继续他的观测搜索小行星吸积到白色矮星的证据，这是由以前观察到的白色矮星光谱丰度异常的动机。他将利用凯克天文台获得白色矮星周围圆盘的光谱，他和一名研究生将对这些光谱进行分析。结果将用于约束行星形成的模型。 这项工作可能会对宇宙化学、行星科学和恒星演化等领域产生更广泛的影响。该项目还将帮助培训一名研究生，他正在参加与中国的外联项目。