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使用三维重构技术分析爆发日珥结构
毕以
Subtype硕士
Thesis Advisor姜云春
2010-09-03
Degree Grantor中国科学院研究生院(云南天文台)
Place of Conferral北京
Degree Discipline天体物理
Keyword太阳暗条 太阳日珥 太阳磁场
Abstract本文首先简要地介绍了暗条(亦称为日珥)的磁场位型及使其爆发的触发机制,之后着重讨论了呈扭绞结构的爆发暗条。扭绞暗条的弯曲的轴反映了磁流体的扭绞不稳定性的磁场结构,表现为一种典型的非平面的特征。本文也介绍了利用STEREO卫星上的紫外波段成像望远镜提高的图像来进行三维重构的技术,以及一些作者已经据此分析的不同种类的暗条的三维结构。2008年4月5日,STEREO卫星上的极紫外波段成像望远镜(Extreme Ultraviolet Imager telescope,EUVI)观测到的一个扭绞的爆发暗条结构。本文通过三维重构技术得到了此暗条的三维扭绞结构,并把它与由PFSS模型外推得到的势场比较,发现此爆发暗条的北部被限制在强场之下,而其上升和扭绞发生在弱场区。
Other AbstractIn this thesis I give a brief introduction of the magnetic field configuration of filament (also called prominences) and possible driving mechanisms of filament instability, and then we concentrate on eruption of kinking filament. A kinking filament with their warped axes, generally regarded as the 'fingerprint' of the MHD helical kink instability, are known as a characteristic three-dimension (3D) structure. Therefore, we summary the 3D reconnection technology by using data from the Extreme UltraViolet Image (EUVI) included in SECCHI Aboard twin STEREO spacescrafts and different kinds of 3D filament structures having been reported. A erupting filament, observed by the Extreme Ultraviolet Imager telescope aboard the STEREO spacecraft, exhibited a kinking structure and tilting motion On 5 April 2008. By using three-dimension (3D) reconstruction technology, I obtain the 3D topology for the kinked prominence when its apex arrived at 1.4 radii. By comparing the 3D structure with the magnetic-field configuration computed by using the Potential-Field Source-Surface (PFSS) model, it is suggested that the filament erupted against the rather weaker than stronger overlying magnetic field, which make it appear to tilt toward one side.
Subject Area天文学
Pages37
Language中文
Document Type学位论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6611
Collection太阳物理研究组
Recommended Citation
GB/T 7714
毕以. 使用三维重构技术分析爆发日珥结构[D]. 北京. 中国科学院研究生院(云南天文台),2010.
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