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题名: Magnetic field evolution leading to solar flares II. Cases with high magnetic shear and flare-related shear change
作者: Li Hui(黎辉); Sakurai, T; Ichimoto, K; UeNo, S
刊名: PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
出版日期: 2000
卷号: 52, 期号:3, 页码:483-497
关键词: Sun : flares ; Sun : magnetic fields ; Sun : X-rays
文章类型: Article
英文摘要: Following Paper I in which we considered five solar flares: we have selected another three solar flares greater than GOES X-ray class M/H alpha importance 1. The three active regions discussed here are characterized by high magnetic shear. We investigated the spatial relationships among Her flare ribbons, soft X-ray (SXR) hare loops, and magnetic configurations for the three flares produced in these active regions. Our results show that only one of these three flares satisfies the sufficient conditions for a flare to occur proposed by Hagyard (1990, AAA 052.075.047). We also discuss the magnetic shear changes around the flaring time only along the neutral lines associated with the studied flares and over the whole flaring area. The flare-related changes on the neutral line are small (2 degrees-4 degrees) and the association of these changes with the hares is not conclusive. The average shear in the flaring areas of the flares associated with high shear decreases significantly after the flares and it may be a better parameter to characterize the hare-related shear changes in such cases.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: X-RAY TELESCOPE ; ACTIVE-REGION ; A MISSION ; JUNE 1991 ; CONFIGURATION ; CURRENTS ; SYSTEM
收录类别: SCI
语种: 英语
WOS记录号: WOS:000088014000009
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/15991
Appears in Collections:太阳高能及相关物理过程研究团组_期刊论文

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作者单位: 1.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
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