Study of 3-dimensional structure of coronal mass ejections in the interplanetary space

行星际空间中日冕物质抛射的三维结构研究

基本信息

批准号：
16340147
负责人：
TOKUMARU Munetoshi
金额：
$ 10.12万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16340147/
关键词：
CME Interplanetary shock Solar wind Interplanetary scintillation Magnetic cloud

项目摘要

1.Determination of 3-dimensional(3D)structure of CMEs by the model fitting analysis of IPS observationsThe 3D distribution of density enhancements associated with CMEs was retrieved from STEL IPS observations for CME events, which produced significant influences on the Earth's magnetosphere. A shell-shaped structure with an isotropic angular extent was revealed for some of the events, and a loop structure elongating in a give n direction was disclosed for other events. From comparison with spacecraft observations, we found that these features corresponded to either the compression region associated with the shock or the coronal ejecta within the CME.2.Analysis of large-scale magnetic structure using cosmic ray modulation observationsThe CME-associated cylindrical structure of the magnetic field deduced from cosmic ray observations of the Sh inshu University was compared with the loop-shaped high density structure determined from STEL IPS observat ions. As result, we found that there was general agreement between them. This fact suggests that the magneti c flux plays an important role in formation of the loop-shaped high density structure.3.Analysis of 3D structure using SMEI (Solar Mass Ejection Imager) and IPS dataThe 3D distribution of high density region retrieved from STEL IPS observations for the 2003 October 28 CM E event was found to be consistent with 3D density reconstruction from simultaneous observations by SMEI. S ince the loop-shaped density structure identified from both observations propagated at slower speed than the sh ock, its origin was considered to be the coronal ejecta confined within the magnetic flux rope.

1.通过对IPS观测值的模型拟合分析对CME的3维（3D）结构进行确定，与CME相关的密度增强的3D分布是从Stel IPS观察结果中检测到的CME事件的，这对地球的磁层产生了重大影响。对于某些事件，揭示了具有各向同性角度范围的壳形结构，并在其他事件上披露了在给出n方向延伸的环结构。从与航天器观测值的比较来看，我们发现这些特征与CME中的冲击或冠状突出相关的压缩区域对应。2。使用宇宙射线调制观察大规模磁性结构的分析观察CME相关的圆柱形结构将SH Inshu大学的宇宙射线观测结果推导出来的磁场与由Stel IPS观测离子确定的环状高密度结构进行了比较。结果，我们发现它们之间有一般共识。这一事实表明，磁磁通量在形成环形高密度结构的形成中起着重要作用。3。使用SMEI（太阳质量弹性成像仪）和IPS Datathe 3D从Stel IPS检索的高密度分布的3D结构的分析发现2003年10月28日E事件的观察结果与SMEI同时观察的3D密度重建是一致的。 S INCE从以较慢的速度传播的两个观测值鉴定出的环形密度结构比SH OCK，其起源被认为是限制在磁通绳内的冠状喷射。