Astrophysics of Single and Binary Star Formation

单星和双星形成的天体物理学

• 批准号: 9819694
• 负责人: Michal Simon
• 金额: $ 18万
• 依托单位: SUNY at Stony Brook
• 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: 1999-06-15 至 2002-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9819694&HistoricalAwards=false
• 关键词: Astrophysics; Single; Binary; Star; Formation

ABSTRACTSimon, Michal"Astrophysics of Single and Binary Star Evolution"AST-9819694This is an imaging and spectroscopic investigation of the role binary stars play in the process of star formation. Infrared (IR) spectra are used to penetrate the dusty regions surrounding young T Tauri binary stars so as to obtain radial velocities for their component stars. The study focuses on improving mass ratios, particularly for components of dissimilar mass. Present surveys tend to be heavily biased towards equal-mass pairs. In a parallel effort, high angular resolution IR observations employing adaptive optics techniques are obtained to determine the binary frequency in the cluster NGC 2024. In a third project, an attempt is being made to identify the ice-band absorption features in the spectra of some young binaries in order to test the hypothesis that observed light variations are produced by structure ("clumpiness") in remnant accretion disks.

[摘要]simon， michael，“单星和双星演化的天体物理学”ast -9819694，这是对双星在恒星形成过程中所起作用的成像和光谱研究。红外（IR）光谱被用来穿透年轻的金牛座T双星周围的尘埃区域，以获得其组成恒星的径向速度。这项研究的重点是提高质量比，特别是不同质量的组件。目前的调查往往严重偏向于等质量对。同时，利用自适应光学技术获得了高角分辨率红外观测数据，以确定NGC 2024星团的双星频率。在第三个项目中，正在尝试确定一些年轻双星光谱中的冰带吸收特征，以检验观测到的光变化是由残余吸积盘的结构（“团块”）产生的假设。