Magnetic field evolution leading to solar flares I. Cases with low magnetic shear and flux emergence

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 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
刊名	PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
	2000
卷号	52 期号:3 页码:465-481
关键词	Sun : flares Sun : magnetic fields Sun : X-rays
ISSN号	0004-6264
英文摘要	We 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.
学科主题	Astronomy & Astrophysics
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 ; A MISSION ; MULTIWAVELENGTH OBSERVATIONS ; ACTIVE REGIONS ; RECONNECTION ; CONFIGURATION ; CURRENTS ; TOPOLOGY ; SYSTEM ; SITES
收录类别	SCI
语种	英语
WOS记录号	WOS:000088014000008
公开日期	2013-02-01
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/8261]
专题	紫金山天文台_太阳高能及相关物理过程研究团组
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
推荐引用方式 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.