Probing the Solar Interior and Atmosphere from the Geographic South Pole

从地理南极探测太阳内部和大气

• 批准号: 9219515
• 负责人: Stuart Jefferies
• 金额: $ 71.16万
• 依托单位: Bartol Research Institute
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-03-01 至 1997-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9219515&HistoricalAwards=false
• 关键词: Probing; Solar; Interior; Atmosphere; Geographic

This grant provides for the continuation of the very productive solar oscillations studies which have been done off and on for many years at South Pole. The telescope will make high resolution (4 arcsecond) images of the full solar disk at two Fraunhofer wavelengths, Hydrogen-alpha and Calcium II K, which come from different heights in the solar atmosphere. The hydrogen line will be analyzed for intensity variations as well as Doppler velocity while the calcium line will be used for intensity variations only. These data will be used to study the interior of the sun by observing the various modes of the exterior vibrations. In particular, studies will focus on the variations of the acoustic oscillations with solar cycle activity, sub-surface structures of magnetic features such as sun spots, the wave properties of the solar atmosphere and the physics of acoustic oscillations with frequencies above 4 mHz. The South Pole is a unique observatory for solar astronomy because only there can one observe the sun for extended periods, such as weeks and months, without diurnal interruptions or variations.

这笔赠款用于继续在南极断断续续地进行多年来卓有成效的太阳振荡研究。该望远镜将在来自太阳大气不同高度的两个夫琅和费波长--氢-α和钙II-K上拍摄完整太阳盘的高分辨率(4角秒)图像。氢线将被分析为强度变化以及多普勒速度，而钙线将仅用于强度变化。这些数据将被用来通过观察太阳外部振动的各种模式来研究太阳内部。特别是，研究将侧重于声振荡随太阳周期活动的变化、太阳黑子等磁性特征的次表层结构、太阳大气的波动特性以及频率在4兆赫以上的声振荡的物理学。南极是一个独特的太阳天文观测站，因为只有在那里，人们才能长时间地观察太阳，例如几周或几个月，而不会有昼夜中断或变化。