Mapping the Sound Speed Structure of the Sun's Atmosphere

[00:8754 . 51]这项工作是利用对太阳表面光信号的速度和强度的观测来研究太阳大气的结构。这些信号将被用来绘制太阳低层大气中声波传播速度的详细地图。反过来，这些地图将被倒置，以提供声速在太阳大气中如何随位置和时间变化的信息。这个项目为能够在三维空间中绘制太阳大气的声学和磁性提供了重要的第一步。这些数据对我们了解太阳如何影响地球过程的探索将是无价的。在这项研究的过程中，将追求三个具体目标：(1)提供太阳低层大气中声速结构的第一张详细地图；(2)检验观测到的结构的短期变化；(3)测试和完善目前的太阳大气模型。南极站作为观测点的优点是天空透明度好，大气湿度低，观测条件长时间稳定。此外，由于地球自转，速度和强度观测不需要对不需要的信号进行校正。

0087541JeffriesThis work is a study of the structure of the solar atmosphere using observations of the velocity and intensity of optical signals from the solar surface. These signals will be used to produce detailed maps of the speed of acoustic waves in the lower part of the solar atmosphere. These maps in turn will be inverted to provide information on how the speed of sound changes with location and time in the solar atmosphere.This project provides an important first step towards being able to map the acoustic and magnetic properties of the Sun's atmosphere in three dimensions. Such data will be invaluable in our quest to understand how the Sun impacts terrestrial processes. Three specific goals will be pursued in the course of this study: (1) to provide the first detailed maps of the sound speed structure in the Sun's lower atmosphere, (2) to examine the short-term variability of the observed structure, and (3) to test and refine current models of the solar atmosphere.The advantages of South Pole station as an observing site include excellent sky transparency, low atmospheric humidity, and long periods of stable seeing conditions. Further, velocity and intensity observations will not require correction for an unwanted signal due to the Earth's rotation.