Discovery and Analysis of Extremely Low Metallicity Stars Horizontal-Branch Stars, and A-Type Stars in the Galactic Halo

银晕中极低金属丰度恒星水平分支星和A型星的发现与分析

• 批准号: 9222326
• 负责人: Timothy Beers
• 金额: $ 19.5万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-03-15 至 1996-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9222326&HistoricalAwards=false
• 关键词: Discovery; Analysis; Extremely; Low; Metallicity

Discovery and Analysis of Extremely Low Metallicity Stars, Horizontal Branch Stars, and A-Type Stars in the Galactic Halo. Dr Beers will carry out follow-up spectroscopic and photometric observations of candidate low metallicity stars, field horizontal branch stars, and apparent main sequence A-type stars discovered in an ongoing survey. Observations of the low metallicity candidates will provide a significant increase in the numbers of stars with metal abundances less than 1/1000th of the solar value, thereby enabling a wide range of investigations concerning the formation and evolution of our Galaxy.

极低金属丰度星的发现与分析， 银河系晕中的水平分支星和A型星。 比尔斯博士将进行后续的光谱和光度测量 候选低金属量恒星的观测，视场水平 发现了分支星和视主序星A型 在一项正在进行的调查中。对低金属量的观察 候选人将提供一个显着增加的数量， 金属丰度小于太阳的千分之一的恒星 价值，从而能够进行广泛的调查， 银河系的形成和演化