CME和冕流结构相互作用机制的数值模拟研究  

A numerical simulation study on the mechanism of interaction between CME and helmet streamer

作　　者：黄福成[1] 

机构地区：[1]中国科学院空间天气学实验室

出　　处：《地球物理学报》2005年第1期13-18,共6页Chinese Journal of Geophysics

基　　金：国家自然科学基金项目 (4 0 3 3 60 5 3 )资助

摘　　要：198 0年 4月 14日SMM卫星曾经观测到了爆发在两冕流结构之间开放磁场中的CME独特的传播特征以及冕流结构的畸变和偏转 .本文采用了 2 5维MHD方程 ,用数值模拟方法研究了CME和冕流结构之间复杂的相互作用过程 .模拟结果不但展现了SMM卫星所观测到的CME的独特的传播特征和冕流结构的畸变和偏转 ,而且还发现了在冕流结构和CME的相互作用中 ,冕流结构内部轴向磁场分量的反转效应 .模拟结果对磁云和磁暴活动的研究也具有一定的意义 .On April 14, 1980, the spacecraft SMM observed the characteristic propagating of the CME eruption in the open magnetic field between two helmet streamers, and the distortion and deflection of the helmet streamer. In this paper, by using the 2 5-dimension MHD equations, the complicated process of the interaction between the CME and helmet streamer is studied through numerical simulation. The simulation result shows the characteristic propagating of this kind of CME, the distortion and deflection of the helmet streamer observed by spacecraft SMM, as well as the inverse effect of the axial component of the magnetic field inside the helmet streamer. This simulation result is also helpful for the study on the magnetic cloud and magnetic storm.

关 键 词：日冕物质抛射 冕流结构 相互作用 数值模拟 

分 类 号：P353[天文地球—空间物理学]