Liu Yu
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Supervisor of Doctorate Candidates
Supervisor of Master's Candidates
- Doctoral Supervisor
- Master Tutor
- Business Address:x30353
- Academic Titles:Director of the Center for Astrophysics, SWJTU
- Other Post:实测天体物理团队负责人
- Alma Mater:中国科学院研究生院（现国科大）
- Supervisor of Doctorate Candidates
- Supervisor of Master's Candidates
- School/Department:School of Physical Science and Technology
- Discipline:Astrophysics.
Space Physics
Plasmphysics
Contact Information
- Email：
- Paper Publications
[Title] Two-stage primary acceleration in filament initial eruption under a fan-spine magnetic configuration
- Impact Factor:5.4
- DOI number:10.48550/arXiv.2512.07566
- Teaching and Research Group:天体物理
- Journal:The Astrophysical Journal
- Key Words:Solar filaments (1495);Solar flares (1496);Solar magnetic fields (1503)
- Abstract:Understaning the filament rising process is crucial for unveiling the triggering mechanisms of the coronal mass ejections and forecasting the space weather. In this paper,we present a detailed study on the filament initial eruption under a fan-spine structure. It was found that the filament underwent two distinct acceleration stages corresponding to a calss M1.0 and M4.6 flare event,respectively. The first acceleration stage commenced with the filament splitting,after which the upper portion was subsequently heated being a hot channel and slow rose at an average speed of 22 km/s. A set of hot reverse C-shaped loops appeared repeatedly during the filament splitting and a hook structure was recognized at this phase,suggesting ongoing growth of the magnetic flux rope (MFR). When it reached a certain altitude,the hot channel appeared to get into a quasi-static phase with its upper edge seriously decelerated and lower edge expanding downward. Approximately 30 minutes later,as a distinct annular ribbon appeared outside the hook structure,the hot channel rose again at a velocity over 50 km/s accompanied with rapid footpoints drifting,and experienced the second acceleration stage with its axial flux increased to 1.1 X 10^{21} Mx. It is deduced that the filament initial eruption under a magnetic dome possess multi kinetic process. We suggest that the magnetic reconnection taken place within and beneath the filament continues to trigger the growth of pre-eruptive MFR and the first acceleration,when the magnetic reconnection above the filament plays a key role in the second acceleration.
- Note:accepted
- Co-author:Yu K,Zhou C,Liu Q,Cheng X,Guo JH,Sha FY,Qiu Y,Liu Y
- First Author:Li HT
- Indexed by:Journal articles
- Document Code:008
- Discipline:Science
- First-Level Discipline:Astronomy
- ISSN No.:0004-637X
- Translation or Not:no
- Date of Publication:2026-01-05
- Included Journals:SCI