Changes in Mass Loss and Evolution on the Asymptotic Giant Branch

渐近巨分支的质量损失变化与演化

• 批准号: 9618503
• 负责人: Gillian Knapp
• 金额: $ 8.4万
• 依托单位: Princeton University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-04-15 至 2001-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9618503&HistoricalAwards=false
• 关键词: Changes; Mass; Loss; Evolution; Asymptotic

Knapp, Gillian AST 96-18503 Dr. Knapp will investigate the phenomenon of mass loss in the late stages of stellar evolution. Her observational program will allow the determination of the size, shape and velocity structure of the dusty molecular circumstellar envelope of stars with the goal of providing insight into the asymmetries of mass loss and the evolution of mass loss rates over time. Two specific projects will be carried out : 1) mapping the radio photospheres of stars with the VLA for comparison with structure observed in the circumstellar envelope, and 2) investigating multiple winds in late AGB stars using a large survey of molecular emission line profiles from circumstellar envelopes. ***

Knapp，Gillian AST 96-18503 Knapp博士将研究恒星演化后期的质量损失现象。她的观测计划将允许确定恒星尘埃分子星周包层的大小、形状和速度结构，目的是洞察质量损失的不对称性和质量损失速率随时间的演变。将实施两个具体项目：1)用VLA绘制恒星的射电光球图，以便与在星周包层中观察到的结构进行比较；2)利用对星周包层分子发射线轮廓的大型调查，研究AGB晚期恒星中的多重风。***