Stellar Abundances and Chemical Evolution from Infrared Spectroscopy

红外光谱中的恒星丰度和化学演化

• 批准号: 9819870
• 负责人: Suchitra Balachandran
• 金额: $ 14万
• 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: 1999
• 资助国家: 美国
• 起止时间: 1999-07-01 至 2002-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9819870&HistoricalAwards=false
• 关键词: Stellar; Abundances; Chemical; Evolution; Infrared

ABSTRACTBalachandran, Suchitra"Stellar Abundances and Chemical Evolution from Infrared Spectroscopy"AST-9819870The chemical abundances of stars in clusters near the center of the Galaxy will be studied using new high-resolution infrared spectroscopic techniques. The evolutionary trends of carbon and oxygen abundances, relative to iron, are key tracers of stellar and galactic chemical evolution. The abundances of these elements will be estimated using the infrared spectral lines of CO and OH, respectively. Both elements provide valuable constraints on stellar interior models, especially with regards to the dredge-up of nuclear processed material via convective motions and rotation. The use of infrared spectra will facilitate stellar abundance determinations in the most heavily obscured regions of the Galactic center. The results of this study are likely to improve our understanding of the chemical evolution of the Galaxy as well as the ages of the Galactic bulge and globular clusters.

摘要Balachandran，Suchitra“从红外光谱学看恒星丰度和化学演化“AST-9819870将使用新的高分辨率红外光谱技术研究银河系中心附近星团中恒星的化学丰度。 碳和氧丰度相对于铁的演化趋势是恒星和星系化学演化的关键示踪剂。 这些元素的丰度将分别使用CO和OH的红外光谱线进行估算。 这两个元素提供了有价值的恒星内部模型的限制，特别是关于核处理材料通过对流运动和旋转的疏浚。 红外光谱的使用将有助于确定银河系中心最严重遮蔽区域的恒星丰度。 这项研究的结果可能会提高我们对银河系化学演化以及银河系核球和球状星团年龄的理解。