Problems in Stellar Abundances and Chemical Evolution: Solutions from Infrared Spectroscopy

恒星丰度和化学演化问题：红外光谱的解决方案

• 批准号: 0098619
• 负责人: Suchitra Balachandran
• 金额: $ 17.04万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-07-01 至 2005-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0098619&HistoricalAwards=false
• 关键词: Problems; Stellar; Abundances; Chemical; Evolution

" Problems in Stellar Abundances and Chemical Evolution: Solutions from Infrared Spectroscopy "AST- 0098619The central region of our galaxy is heavily obscured and, until the development of infrared instrumentation, was inaccessible to spectroscopic observation. But it is here that we expect to see the long-term effects of vigorous star formation on the chemical abundances of our galaxy. Thus the availability of infrared spectrographs has opened a new window of opportunity for observing stars to investigate abundance trends where they are likely to be the most conspicuous. The work during this two year award will be directed towards the changing abundances of oxygen and carbon in the atmospheres of cool stars in the halo and in the galactic center region. A further advantage of working in the infrared comes from the relative cleanness of the spectrum and an atmospheric opacity which is better understood. The project will use high resolution echelle spectrographs at Cerro Tololo Inter-American Observatory and at the Infrared Telescope Facility in Hawaii. Plans are also being made to observe with the two Gemini telescopes.

“恒星丰度和化学演化的问题：红外光谱的解决方案“AST-0098619我们星系的中心区域被严重遮蔽，直到红外仪器的发展，光谱观测是无法到达的。但正是在这里，我们希望看到活跃的星星形成对我们银河系化学丰度的长期影响。因此，红外光谱仪的可用性为观测恒星打开了一扇新的机会之窗，以调查它们可能最明显的丰度趋势。在这两年的奖项工作将针对不断变化的丰度的氧和碳在大气中的冷恒星的光环和银河系中心区域。在红外线下工作的另一个优点是光谱的相对清洁和大气的不透明度，这是更好地理解。该项目将使用Cerro Tololo美洲天文台和夏威夷红外望远镜设施的高分辨率阶梯光栅摄谱仪。还计划用两台双子座望远镜进行观测。