High Resolution Spectroscopy of Pre-Main Sequence Stars

前主序星的高分辨率光谱

• 批准号: 0702941
• 负责人: George Herbig
• 金额: $ 19.55万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-07-01 至 2013-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0702941&HistoricalAwards=false
• 关键词: Resolution; Spectroscopy; Pre; Main; Sequence

Dr. Herbig will carry out a two-part investigation with the Keck I telescope on Mauna Kea and its HIRES high-resolution spectrograph to (1) examine objects located above the T Tauri region in young clusters, where it is believed that massive (= 3 solar mass) pre-main sequence stars in transit to B- and A-types on the zero-age main sequence should be found and (2) investigate two species of pre-main sequence stars (FUors and EXors) that, although very different spectroscopically and photometrically, are both subject to unpredictable brightenings from minimum light. Whether all intermediate-mass stars are subject to this instability is uncertain. This investigation will shed light on whether the planets on our solar system were once exposed to such actvity when the Sun was young.

Herbig博士将使用Mauna Kea上的Keck I望远镜及其HIRES高分辨率摄谱仪进行两部分调查，以（1）检查位于年轻星团中T Tauri区域上方的物体，据信，（= 3太阳质量）前主序星过渡到B-和A-型的零年龄主序应该被发现;（2）调查两种前主序星主序星（FUor和EXor），虽然在光谱和光度上有很大的不同，但都受到来自最小光的不可预测的增亮的影响。是否所有的中等质量恒星都受到这种不稳定性的影响还不确定。这项调查将揭示我们太阳系的行星是否在太阳年轻时曾经暴露在这样的活动中。