| 不同类型日冕物质抛射事件的比较 |
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| 引用本文： | 向长青,王敬芳,邓凌云,熊东辉.不同类型日冕物质抛射事件的比较[J].地球物理学报,2000,43(6):581-588. |
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| 作者姓名： | 向长青 王敬芳 邓凌云 熊东辉 |
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| 作者单位： | 武汉大学物理与电信科学学院无线电科学与技术系,武汉430072 |
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| 基金项目： | 国家自然科学基金项目!( 49874 0 38) |
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| 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 .
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| 关 键 词： | 日冕物质抛射 激波演化 暗腔 高密度等离子体团 |
| 收稿时间： | 1999-09-02 |
A COMPARISON OF DIFFERENT TYPES OF CORONAL MASS EJECTIONS |
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| XIANG CHANG-QING,WANG JING-FANG,DENG LING-YUN,XIONG DONG-HUI.A COMPARISON OF DIFFERENT TYPES OF CORONAL MASS EJECTIONS[J].Chinese Journal of Geophysics,2000,43(6):581-588. |
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| Authors: | XIANG CHANG-QING WANG JING-FANG DENG LING-YUN XIONG DONG-HUI |
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| Institution: | Department of Radio Science and Technology,College of Physics and Electronic Information Science,Wuhan University,Wuhan 430072,China |
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| Abstract: | 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. |
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| Keywords: | Coronal mass ejections Dark cavity Evolution of shock Plasmoid of high densil |
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