Tracing the Metallicity in High Redshift Quasars with FeII Spectra

用 FeII 光谱追踪高红移类星体的金属丰度

• 批准号: 0206150
• 负责人: Ekaterina Verner
• 金额: $ 21.87万
• 依托单位: Catholic University of America
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-09-01 至 2006-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0206150&HistoricalAwards=false
• 关键词: Tracing; Metallicity; Redshift; Quasars; FeII

AST-0206150Verner, Ekaterina M.High-redshift quasars are currently the only objects that can give us information aboutnucleosynthesis in the very Early Universe. Many exhibit prominent FeII emission features in their spectra. Because the relative abundance of Fe is tightly correlated with Type-Ia supernovae, FeII becomes a very important chronological indicator of the age of star formation activity at the earliest epochs. The principal goal of this work is to develop diagnostic tools to interpret this FeII emission. These FeII diagnostics will be used as cosmological probes of star-formation and to determine the iron abundance in the quasars of the Early Universe. This project is designed to combine the efforts of the leading theoretical, observational and experimental groups working on FeII from the USA, Europe and Japan, and is therefore international in scope. It includes both space- and ground-based spectroscopic observations, theoretical and experimental input from atomic physics, and finally will culminate in theoretical modeling of the observed FeII.***

AST-0206150 Verner，Ekaterina M.高红移类星体是目前唯一可以给我们关于早期宇宙核合成信息的天体。许多表现出突出的FeII在其光谱发射功能。由于Fe的相对丰度与Ia型超新星密切相关，Fe II成为最早期星星形成活动年龄的一个非常重要的年代学指标。这项工作的主要目标是开发诊断工具来解释这种FeII排放。这些FeII诊断将被用作恒星形成的宇宙学探针，并确定早期宇宙类星体中的铁丰度。 该项目旨在联合收割机的努力，领先的理论，观测和实验小组的工作，从美国，欧洲和日本，因此是国际范围内。它包括空间和地面的光谱观测，来自原子物理学的理论和实验输入，最后将在观测到的FeII的理论建模中达到高潮。