博士生导师
硕士生导师
个人信息Personal Information
学历：博士研究生毕业
学位：理学博士学位
性别：男
在职信息：在岗
主要任职：天体物理中心负责人
其他任职：实测天体物理团队负责人
毕业院校：中国科学院研究生院（现国科大）
学科：天体物理. 空间物理学. 等离子体物理
所在单位：物理科学与技术学院
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[Title] The Formation of a Multifilament System Driven by Photospheric Converging Motions in a Bipolar Sunspot
影响因子：11.7
DOI码：10.3847/2041-8213/ada893
教研室：天体物理
发表刊物：The Astrophysical Journal Letters
关键字：Solar filaments (1495); Solar magnetic reconnection (1504)
摘要：Solar filaments are believed to be a clump of cold plasma accumulated in the magnetic dips. However, the magnetic configuration of filaments and the key factors for their formation remains elusive. In this Letter, we present a detailed study of the formation and eruption of a multifilament system with observations and simulations. Before the filament appeared visible, the chromospheric fibrils gradually gathered together, evolving from a diffuse distribution into threadlike structures that were nearly parallel to the polarity inversion lines. On 2022 March 20, an arch filament first appeared showing high dynamics, and subsequently two reserved S-shaped filaments were visibly observed. These two filament segments further reconnected, forming a long coherent filament and resulting in a double-decker configuration. In addition, continuous converging motion and magnetic flux cancellation were found in the photosphere during the evolution. Simultaneously, more bald patch structures appeared at the polarities' collision position. Through a data-driven numerical simulation, we further reconstructed the coronal magnetic field, which is composed of two twisted magnetic flux ropes (MFRs) with their bottom touching the photosphere, along with a group of sheared arcades forming an X-shaped configuration. These findings suggest that the magnetic configuration of the filament is in a highly dynamic state, evolving from a hybrid to a coherent MFR. Moreover, we propose that the formation and eruption of the multifilament system are closely related to magnetic reconnection taking place on the photosphere and in the lower corona, respectively, both mainly driven by the photospheric converging motion.
第一作者：Li,H.T.
论文编号：004
学科门类：理学
一级学科：天文学
卷号：979
页面范围：9
ISSN号：2041-8205
是否译文：否
发表时间：2025-01-29