Reconstruction of a Highly Twisted Magnetic Flux Rope for an Inter-active-region X-Class Solar Flare
Solar eruptions are manifestation of explosive release of magnetic energy in the Sun's corona. Large solar eruptions originate mostly within active regions, where strong magnetic fields concentrate on the solar surface. Here we studied the magnetic field structure for an exception, which is a p...
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doaj-e9e6ae5de7ee459da6560ee3cc1414142020-11-25T02:00:26ZengFrontiers Media S.A.Frontiers in Astronomy and Space Sciences2296-987X2019-10-01610.3389/fspas.2019.00063480983Reconstruction of a Highly Twisted Magnetic Flux Rope for an Inter-active-region X-Class Solar FlareChaowei Jiang0Aiying Duan1Xueshang Feng2Peng Zou3Pingbing Zuo4Yi Wang5Institute of Space Science and Applied Technology, Harbin Institute of Technology, Shenzhen, ChinaSchool of Atmospheric Sciences, Sun Yat-sen University, Zhuhai, ChinaSIGMA Weather Group, State Key Laboratory for Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing, ChinaInstitute of Space Science and Applied Technology, Harbin Institute of Technology, Shenzhen, ChinaInstitute of Space Science and Applied Technology, Harbin Institute of Technology, Shenzhen, ChinaInstitute of Space Science and Applied Technology, Harbin Institute of Technology, Shenzhen, ChinaSolar eruptions are manifestation of explosive release of magnetic energy in the Sun's corona. Large solar eruptions originate mostly within active regions, where strong magnetic fields concentrate on the solar surface. Here we studied the magnetic field structure for an exception, which is a peculiar GOES X1.2 flare accompanied with a very fast coronal mass ejection taking place between two active regions, where the magnetic field is relatively weak. The pre-flare magnetic field is reconstructed from the SDO/HMI vector magnetogram, using a non-linear force-free field extrapolation method. It is found that prior to the flare, there is a highly twisted magnetic flux rope with magnetic field lines winding over 6 turns, which connects the border of a leading sunspot of one active region and the following polarity of the neighboring active region. The basic configuration of the flux rope is consistent with the observed sigmoidal coronal loops and filament channels by SDO/AIA. It resides rather low-lying between the active regions such that the torus instability is not able to be triggered. Thus, it is likely that, due to the strong magnetic twist, the kink instability of the flux rope triggers the eruption.https://www.frontiersin.org/article/10.3389/fspas.2019.00063/fullmagnetic fieldsmethods: numericalsun: coronasun: flaressun: filaments |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Chaowei Jiang Aiying Duan Xueshang Feng Peng Zou Pingbing Zuo Yi Wang |
spellingShingle |
Chaowei Jiang Aiying Duan Xueshang Feng Peng Zou Pingbing Zuo Yi Wang Reconstruction of a Highly Twisted Magnetic Flux Rope for an Inter-active-region X-Class Solar Flare Frontiers in Astronomy and Space Sciences magnetic fields methods: numerical sun: corona sun: flares sun: filaments |
author_facet |
Chaowei Jiang Aiying Duan Xueshang Feng Peng Zou Pingbing Zuo Yi Wang |
author_sort |
Chaowei Jiang |
title |
Reconstruction of a Highly Twisted Magnetic Flux Rope for an Inter-active-region X-Class Solar Flare |
title_short |
Reconstruction of a Highly Twisted Magnetic Flux Rope for an Inter-active-region X-Class Solar Flare |
title_full |
Reconstruction of a Highly Twisted Magnetic Flux Rope for an Inter-active-region X-Class Solar Flare |
title_fullStr |
Reconstruction of a Highly Twisted Magnetic Flux Rope for an Inter-active-region X-Class Solar Flare |
title_full_unstemmed |
Reconstruction of a Highly Twisted Magnetic Flux Rope for an Inter-active-region X-Class Solar Flare |
title_sort |
reconstruction of a highly twisted magnetic flux rope for an inter-active-region x-class solar flare |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Astronomy and Space Sciences |
issn |
2296-987X |
publishDate |
2019-10-01 |
description |
Solar eruptions are manifestation of explosive release of magnetic energy in the Sun's corona. Large solar eruptions originate mostly within active regions, where strong magnetic fields concentrate on the solar surface. Here we studied the magnetic field structure for an exception, which is a peculiar GOES X1.2 flare accompanied with a very fast coronal mass ejection taking place between two active regions, where the magnetic field is relatively weak. The pre-flare magnetic field is reconstructed from the SDO/HMI vector magnetogram, using a non-linear force-free field extrapolation method. It is found that prior to the flare, there is a highly twisted magnetic flux rope with magnetic field lines winding over 6 turns, which connects the border of a leading sunspot of one active region and the following polarity of the neighboring active region. The basic configuration of the flux rope is consistent with the observed sigmoidal coronal loops and filament channels by SDO/AIA. It resides rather low-lying between the active regions such that the torus instability is not able to be triggered. Thus, it is likely that, due to the strong magnetic twist, the kink instability of the flux rope triggers the eruption. |
topic |
magnetic fields methods: numerical sun: corona sun: flares sun: filaments |
url |
https://www.frontiersin.org/article/10.3389/fspas.2019.00063/full |
work_keys_str_mv |
AT chaoweijiang reconstructionofahighlytwistedmagneticfluxropeforaninteractiveregionxclasssolarflare AT aiyingduan reconstructionofahighlytwistedmagneticfluxropeforaninteractiveregionxclasssolarflare AT xueshangfeng reconstructionofahighlytwistedmagneticfluxropeforaninteractiveregionxclasssolarflare AT pengzou reconstructionofahighlytwistedmagneticfluxropeforaninteractiveregionxclasssolarflare AT pingbingzuo reconstructionofahighlytwistedmagneticfluxropeforaninteractiveregionxclasssolarflare AT yiwang reconstructionofahighlytwistedmagneticfluxropeforaninteractiveregionxclasssolarflare |
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1724960531318571008 |