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: 9014390
• 负责人: Robert Rosner
• 金额: $ 7.01万
• 依托单位: University of Chicago
• 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: 1990-11-01 至 1994-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9014390&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. ***

太阳表层的磁流体动力学（MHD）过程引起了人们极大的兴趣，因为首先，这些现象在很大程度上是太阳活动的原因；其次，它们挑战了我们对这些过程背后的基础物理的理论理解；第三，理论计算的预测可以直接进行观测检验。这项工作的重点是研究太阳表层的超稳定模式；包括（1）太阳对流区和光球层中声波的激发，（2）太阳声波振荡功率在一定时空范围内的集中，（3）热层和重力分层光球磁通量管（如太阳黑子）中MHD波的激发。 这项工作涉及分析研究和数值模拟。 ***