Mapping the Sound Speed Structure of the Sun's Atmosphere

绘制太阳大气的声速结构图

• 批准号: 0087541
• 负责人: Stuart Jefferies
• 金额: $ 66.41万
• 依托单位: University of New Mexico
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-07-01 至 2005-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0087541&HistoricalAwards=false
• 关键词: Mapping; Sound; Speed; Structure; Sun

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.

0087541杰弗里斯这项工作是利用观测来自太阳表面的光信号的速度和强度来研究太阳大气的结构。 这些信号将用于绘制太阳大气层下部声波速度的详细地图。 这些地图将反过来提供关于太阳大气层中声速如何随位置和时间变化的信息，该项目为能够绘制三维太阳大气层的声学和磁性特性图迈出了重要的第一步。 这些数据对于我们了解太阳如何影响地球过程的探索将是非常宝贵的。 在本研究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批详细地图，（2）检查观测到的结构的短期变化，（3）测试和改进目前的太阳大气模型，南极站作为观测地点的优点包括天空透明度高，大气湿度低，和长时间稳定的视觉条件。 此外，速度和强度观测将不需要校正由于地球自转而产生的不需要的信号。