Magnetohydrodynamic Processes in the Surface Layers of the Sun

太阳表层的磁流体动力学（MHD）过程非常有趣，因为，首先，这些现象在很大程度上负责太阳活动；其次，它们挑战了我们对这些过程背后的基本物理学的理论理解；第三，理论计算的预测可以经受直接的观测检验。这项工作的重点是研究太阳表层的超稳定模式；包括(1)太阳对流区和光球中声波的激发；(2)太阳声振荡功率在一定时空范围内的集中；(3)热、重力分层的光球磁通量管（如太阳黑子）中MHD波的激发。这项工作包括分析研究和数值模拟。*** //

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. *** //