Probing the Solar Interior and Atmosphere from the Geographic South Pole

这笔经费用于继续进行多年来在南极断断续续进行的卓有成效的太阳振荡研究。该望远镜将在两个弗劳恩霍夫波长，氢- α和钙II K，从太阳大气层的不同高度拍摄高分辨率（4弧秒）的太阳圆盘图像。氢谱线将分析强度变化和多普勒速度，而钙谱线将仅用于强度变化。这些数据将用于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，研究将集中在声波振荡随太阳周期活动的变化，磁特征的亚表面结构，如太阳黑子，太阳大气的波动特性和频率在4mhz以上的声波振荡的物理特性。南极是一个独特的太阳天文观测站，因为只有在那里，人们才能长期观察太阳，比如几周或几个月，而不会出现昼夜中断或变化。

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.