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日冕物质抛射起源的动力学研究
马素丽
Subtype博士
Thesis Advisor林隽
2010-08-17
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太阳物理 太阳爆发 日冕物质抛射 日冕波
Abstract日冕物质抛射(CME)是太阳大气中磁化等离子体的剧烈的爆发,通常认为它起源于太阳日冕。日冕物质抛射是灾害性空间天气产生的重要原因。本论文旨在利用日地关系卫星( STEREO )卫星来研究日冕物质抛射起源的动力学演化。日地关系卫星( STEREO )的成功发射首次提供了研究日冕物质抛射三维结构机会。STEREO 有两个同样的卫星组成,分别放置在和地球轨道近似的不同的轨道上,其中一个在地球前面被称为STEREO A另一个在地球的后面称为STEREO B。本文主要利用STEREO 上的极紫外成像仪(EUVI)和内外日冕仪(COR1和COR2)以及其他仪器观测到的数据对日冕物质抛射的起源以及相关的现象进行研究。
Other AbstractCoronal mass ejections (CMEs) are massive eruptions of magnetised plasma that is believed to be originated from the solar corona. CMEs are known to play a significant role in driving disastrous space weather. This thesis focuses on understanding the dynamics of CMEs source regions with the observations made by STEREO, the Solar Terrestrial Relations Observatory. The successful launch of STEREO provides us with the first-ever stereoscopic measurements to study the 3D structures of CMEs. With the data from Extreme Ultra-Violet Imager (EUVI) and coronagraphs COR1 and COR2 onboard both STEREO Ahead (A) and STEREO Behind (B) and the data from other instruments, we studied of the initiation of a CME and its associated phenomena. The CME occurs on 2007 December 7, during which the separation angle of STEREO A with B is about 42.4◦ . This offers us a good opportunity to study the initiation of the CME stereoscopically. Using the data from both STEREO A and B, we made a detailed comparison for the morphologies and kinematics of its associated “EIT wave”. The results indicate that the nascent CME seems to affect the morphology of the EIT wave, vise verse, i.e., the morphology of EIT wave reflects the morphology of the CME. Taking the advantage of the two viewpoints of the STEREO spacecrafts from January 1 to August 31, 2009, we identified 34 CMEs that originated from almost one quarter of the Sun which faces the Earth. It is found that about 33 % of them had no distinct low coronal signature (such as coronal dimming, coronal wave, filament eruption, post-eruptive arcade). It might be a new challenge for our present models of CME origination. What is the trigger for the CMEs without no distinct low coronal signature? Is there any difference between the two kinds of CMEs? What is the implication for CME prediction? These questions are discussed in this thesis.
Subject Area天文学
Pages116
Language中文
Document Type学位论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6610
Collection太阳物理研究组
Recommended Citation
GB/T 7714
马素丽. 日冕物质抛射起源的动力学研究[D]. 北京. 中国科学院研究生院(云南天文台),2010.
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