Magnetohydrodynamic Processes in the Surface Layers of the Sun

太阳表面层的磁流体动力学过程

• 批准号: 9014888
• 负责人: Yu-Qing Lou
• 金额: $ 2.23万
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-10-15 至 1991-10-15
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9014888&HistoricalAwards=false
• 关键词: Magnetohydrodynamic; Processes; Surface; Layers; Sun

Magnetohydrodynamic (MHD) processes in the surface layers of the sun are of great interest because, first, these phenomena are largely responsible for solar activity; second, they challenge our theoretical understanding of the basic physics underlying these processes; and third, predictions of theoretical calculations can be subjected to direct observational test. This work focusses on a study of overstable modes in the surface layers of the sun; including (1) the excitation of acoustic waves in the solar convection zone and photosphere, (2) the concentration of solar acoustic oscillation power in certain temporal and spatial ranges, and (3) the excitation of MHD waves in thermally and gravitationally stratified photospheric magnetic flux tubes (such as sunspots). The work involves both analytical studies and numerical simulations. *** //

磁流体动力学（MHD）过程中的表面层 太阳之所以引起人们极大兴趣，首先是因为这些现象 主要负责太阳活动;第二，他们挑战 我们对基础物理学的理论理解 这些过程;第三，理论预测 计算结果可以直接进行观测检验。这 工作集中在研究表面的过稳定模式 太阳的层;包括（1）声波的激发 在太阳对流层和光球层，（2） 太阳声振荡功率的集中 时间和空间范围;（3）MHD波的激发 在热和重力分层的光球磁场中， 通量管（如太阳黑子）。 这项工作既涉及分析 研究和数值模拟。 *** //