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太阳暗条形成和爆发的高分辨观测研究
其他题名High-resolution Observations of the Formation and Eruption of Filaments
戴俊
学位类型硕士
导师杨家艳
2019-07-01
学位授予单位中国科学院大学
学位授予地点北京
学位专业天体物理
关键词暗条爆发 磁重联 旋转磁场 扭缠不稳定性
摘要对暗条的研究是当前太阳物理研究中最热门的前沿课题之一。近年研究发现日冕物质抛射(CME)同暗条爆发密切相关,而且暗条爆发往往伴随着双带耀斑的开始。因此对于暗条的分析研究,不仅能够让我们探讨暗条本身的活动现象,也将有助于我们更深入的了解CME和耀斑等爆发活动的物理本质。SDO卫星自2010年升空开始,为我们源源不断地提供了全日面、多波段和高时空分辨率的连续观测,以及光球视向磁场和矢量磁场等磁场数据。这为我们筛选、获取以及分析研究暗条事件提供了可靠的数据基础。云南抚仙湖太阳观测与研究基地NVST望远镜已经为我们提供具有更高时空分辨率的观测数据。利用太阳动力学天文台(SDO)和新真空太阳望远镜(NVST)的高质量观测数据,我们对暗条的形成和爆发做了较为详细的研究。到目前为止所取得研究进展主要有:(1)通过观测活动区两个交叉暗条的爆发过程,对暗条爆发产生的耀斑双带、耀斑后环、电流片、磁岛、日冕物质抛射(CME)作了详细的研究;首次报道了连接上方爆发暗条和下方耀斑双带的电流片;为磁绳灾变模型提供了日面观测的新证据。(2)我们研究了日面中心附近一个小尺度暗条的形成和爆发,暗条负极足点的逆时针旋转形成了S状弯曲结构的暗条,增加了暗条磁通量绳的扭缠度,达到了扭曲不稳定性触发机制的阈值,暗条附近的小尺度日浪活动持续扰动暗条,并且加速了暗条的爆发。本文主要介绍关于暗条的研究工作,并通过两个事例对于暗条的形成和爆发过程作了详细的观测研究,所取得的研究进展有助于提高人们对暗条的认识,有助于加深人们对于暗条形成和爆发的理解。关于暗条的研究可以帮助人们深入了解太阳爆发事件的物理过程,为预报相关的空间灾害性天气提供了观测依据。
其他摘要The study of Filaments is one of the hottest topics in solar physics. Recent studies have shown that coronal mass ejections (CME) are closely related to Filaments,which are often accompanied by the onset of two flare ribbons. Therefore,the analysis and study of Filaments can not only enable us to explore the activity phenomenon of Filaments themselves,but also help us to have a deeper understanding of the physical nature of CME and flare and other explosive activities.Since its launch in 2010,the Solar Dynamic Observatory has provided us with a continuous stream of observations at full solar, multiband,and high spatial and temporal resolution,as well as magnetic field data such as optical spherical apparent magnetic field and vector magnetic field.Using high quality observations from the solar dynamics observatory (SDO) and the new vacuum solar telescope (NVST),we have studied the formation and explosion of Filaments in detail. Up to now,the research progress is mainly as follows:(1) by observing the explosive process of two crossing Filaments in the active region, the two flare ribbons,the post-flare loops, the current sheets,the plasmoids and the coronal mass ejection (CME) produced by the eruption of filaments are studied in detail;We report the CSs connecting the lower flare ribbons and the upper erupting filaments for the first time. (2) We studied the formation and explosion of a small scale filament near the center of the sun. The counterclockwise rotation of the negative foot point of the filament forms a s-shaped structure,which increases the Twist of the magnetic flux rope of the filament and reaches the threshold of the kink instability. The small scale wave activity near the filament continuously perturbs the filament and accelerates the eruption of the filament.This paper mainly introduces the research work of Filaments,and through two examples,makes a detailed observation and research on the formation and Eruption process of Filaments,and the research progress is helpful to improve people's understanding of filaments and deepen people's understanding of the formation and Eruption of filaments. The research on filaments can help people understand the physical process of solar eruptive activities deeply and provide observation basis for predicting the relevant space disastrous weather.
学科领域天文学 ; 太阳与太阳系 ; 太阳物理学
学科门类理学 ; 理学::天文学
页数65
语种中文
文献类型学位论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/25439
专题太阳物理研究组
作者单位中国科学院云南天文台
第一作者单位中国科学院云南天文台
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GB/T 7714
戴俊. 太阳暗条形成和爆发的高分辨观测研究[D]. 北京. 中国科学院大学,2019.
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