摘要
依据二维磁流体力学方程组 ,在子午面内分别数值模拟了与动量扰动和温度扰动相关的日冕物质抛射事件 (CME) ,并将二者结果进行对比 .结果认为 :二者在事件的空间结构 ,前沿激波的演化 ,暗腔的形成及作用 ,扰动后近日面新喷发物质的特征等方面是相似的 ;但在前沿激波的传播速度 ,强度和径向演化进程 ,暗腔的行为和磁感应强度以及后随等离子体团的密度等方面却不相同 .
Using two dimensional magnetiohydrodynamic (MHD) system as the governing equation,we conduct an simulation to model coronal mass ejections associated with the perturbations of momentum and temperature,respectively. Comparison of these two types of perturbations shows that they are similar in the spatial structure,the evolution of the leading shock,the formation and the role of dark cavity and the characteristics of newly erupted materials near the solar surface,but they are different in the propagation velocity,the strength and the progress of radial evolution of the leading shock,the magnetic field strength and the action of the dark cavity,and the density of the following plasmoid. [
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第6期729-737,共9页
Chinese Journal of Geophysics
基金
国家自然科学基金项目!( 49874 0 38)
关键词
日冕物质抛射
激波演化
暗腔
CME
数值模拟
Coronal mass ejections,Dark cavity,Evolution of shock,Plasmoid of high densil