The Analysis of Cool Stars Using Synthetic Spectroscopy and Photometry

利用合成光谱学和光度测定法分析冷恒星

• 批准号: 8918461
• 负责人: Roger Bell
• 金额: $ 19万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-03-15 至 1993-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8918461&HistoricalAwards=false
• 关键词: Analysis; Cool; Stars; Using; Synthetic

The Principal Investigator proposes to derive the abundances of carbon (C), nitrogen (N), and oxygen (O) in the atmospheres of cool stars and stars at the turn-off region in the Hertzsprung-Russel diagram of globular clusters. (Globular star clusters are aggregates of about 100,000 to 1,000,000 stars and among the oldest objects in our and other galaxies.) The tools for this research are computer codes for stellar atmospheres and a large file of data of atomic and molecular spectral lines. The models are flux constant and include the effects of convection and line absorption. The theoretical results will be compared with observations with the aim of determining the ages of globular clusters, the mechanisms of mixing in red giant stars, the primordial CNO abundances and how they were produced, and the difference between globular clusters in our Galaxy and the Andromeda galaxy.

主要研究者建议， 碳（C）、氮（N）和氧（O）在冷空气中 恒星和恒星在赫兹-罗素的关闭区 球状星团的示意图。 （球状星星星团是 由大约10万到100万颗恒星组成的集合体， 我们和其他星系中的物体）。 这项研究的工具 是恒星大气层的计算机代码和一个大的数据文件 原子和分子的光谱线。 模型是通量的 常数，包括对流和线吸收的影响。 理论结果将与观测结果进行比较， 确定球状星团年龄的目的， 红巨星的混合，原始的CNO丰度以及如何 球状星团之间的差异 在我们的银河系和仙女座星系。