Spectroscopy of Single and Binary T Tauri Stars

单双星和双星 T Tauri 星的光谱

• 批准号: 9528272
• 负责人: Gibor Basri
• 金额: $ 9.99万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-06-01 至 2000-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9528272&HistoricalAwards=false
• 关键词: Spectroscopy; Single; Binary; Tauri; Stars

Basri, Gibor 95-28272 T Tauri stars are solar-type stars at the beginning of their lives. Studying them involves studies of star formation, stellar activity, accretion disks and strong bipolar outflows. One of the richest sources of information on these objects are their emission line profiles, though they are poorly understood because the line formation region is complex and quite time-variable on scales of minutes to years. Dr. Basri plans to characterize the time-variable behavior of the spectral lines using numerous spectral observations of bright T Tauri star systems. In addition he will undertake an extensive program to model the line emission region within the star. His research also involves a study of the first close low mass binary system forming within a disk, while searching for similar systems. The last part of his research program is to attempt to obtain velocities for some of the T Tauri binaries. Along with orbits from speckle interferometry, this would allow a direct measurement of the masses of both stars in the system, a major step in the calibration of pre-main sequence evolutionary tracks. ***

Basri，Gibor 95-28272 T金牛座恒星是太阳类型的恒星，在它们生命的开始阶段。对它们的研究涉及恒星形成、恒星活动、吸积盘和强双极外流的研究。关于这些天体的最丰富的信息来源之一是它们的发射线轮廓，尽管人们对它们知之甚少，因为谱线形成区域很复杂，而且在几分钟到几年的尺度上非常时变。巴斯里博士计划通过对明亮的T-Tauri恒星系统的大量光谱观测来表征谱线的时变行为。此外，他还将开展一项广泛的计划，对恒星内部的谱线发射区进行建模。他的研究还包括在寻找类似系统的同时，研究在圆盘内形成的第一个封闭的低质量双星系统。他的研究计划的最后一部分是试图获得一些T Tauri双星的速度。与散斑干涉测量的轨道一起，这将允许直接测量系统中两颗恒星的质量，这是校准前主序演化轨迹的重要一步。***