The Deformation of an Erupting Magnetic Flux Rope in a Confined Solar Flare

The Astrophysical Journal. Letters

article

Ruisheng Zheng¹  Yihan Liu¹  Liang Zhang¹  Yang Liu¹  Changhui Rao⁴  Qing Lin⁷  Zhimao Du⁷  Libo Zhong⁴  Huadong Chen³  Yao Chen¹ 

[1] Institute of Space Sciences, Shandong University;Institute of Frontier and Interdisciplinary Science, Shandong University;CAS Key Laboratory of Solar Activity, National Astronomical Observatories;Institute of Optics and Electronics, Chinese Academy of Sciences;The Key Laboratory on Adaptive Optics, Chinese Academy of Sciences;University of Chinese Academy of Sciences;Shanghai Astronomy Museum

DOI  :  10.3847/2041-8213/acabc9

来源: IOP Publishing Limited

【 摘 要 】

Magnetic flux ropes (MFRs), sets of coherently twisted magnetic field lines, are believed as core structures of various solar eruptions. Their evolution plays an important role to understand the physical mechanisms of solar eruptions, and can shed light on adverse space weather near the Earth. However, the erupting MFRs are occasionally prevented by strong overlying magnetic fields, and the MFR evolution during the descending phase in the confined cases is lacking attention. Here, we present the deformation of an erupting MFR accompanied by a confined double-peaked solar flare. The first peak corresponded to the MFR eruption in a standard flare model, and the second peak was closely associated with the flashings of an underlying sheared arcade (SA), the reversal slipping motion of the L-shaped flare ribbon, the falling of the MFR, and the shifting of top of filament threads. All results suggest that the confined MFR eruption involved in two-step magnetic reconnection presenting two distinct episodes of energy release in the flare impulsive phase, and the latter magnetic reconnection between the confined MFR, and the underlying SA caused the deformation of the MFR. It is proposed that an intergrated evolution for confined MFR eruptions can compose of three stages: the eruption, the confinement, and the deformation.

【 授权许可】

Unknown