PMO OpenIR  > 太阳高能及相关物理过程研究团组
Magnetic field evolution leading to solar flares I. Cases with low magnetic shear and flux emergence
Li, H; Sakurai, T; Ichimoto, K; UeNo, S
2000
Source PublicationPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
ISSN0004-6264
Volume52Issue:3Pages:465-481
AbstractWe picked up five solar flares larger than GOES X-ray class M/H alpha importance 1, and studied the magnetic evolution of the corresponding active regions. In particular, we investigated the spatial relationships among H alpha flare ribbons, soft X-ray (SXR) hare loops, and magnetic configurations. Our results show that all of these flares are not associated with high magnetic shear, but with emerging flux, indicating that flux emergence is a common phenomenon in this kind of solar flare with low magnetic shear. The maximum values of the transverse magnetic fields on the neutral lines responsible for these hares are 300-800 G. All of these flares but one have multiple (more than two) H alpha ribbons, and almost all of these ribbons are located at the footpoints of SXR flare loops. The flare-related shear changes, which can be both positive and negative, may be determined by the balance of the energy carried by the emerging flux and that required to power the flare.
KeywordSun : Flares Sun : Magnetic Fields Sun : X-rays
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordX-RAY TELESCOPE ; A MISSION ; MULTIWAVELENGTH OBSERVATIONS ; ACTIVE REGIONS ; RECONNECTION ; CONFIGURATION ; CURRENTS ; TOPOLOGY ; SYSTEM ; SITES
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000088014000008
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/8261
Collection太阳高能及相关物理过程研究团组
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Purple Mt Observ, Nanjing 210008, Peoples R China
2.Natl Astron Observ, Mitaka, Tokyo 1818588, Japan
3.Kyoto Univ, Hida Observ, Gifu 5061317, Japan
Recommended Citation
GB/T 7714
Li, H,Sakurai, T,Ichimoto, K,et al. Magnetic field evolution leading to solar flares I. Cases with low magnetic shear and flux emergence[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2000,52(3):465-481.
APA Li, H,Sakurai, T,Ichimoto, K,&UeNo, S.(2000).Magnetic field evolution leading to solar flares I. Cases with low magnetic shear and flux emergence.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,52(3),465-481.
MLA Li, H,et al."Magnetic field evolution leading to solar flares I. Cases with low magnetic shear and flux emergence".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 52.3(2000):465-481.
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