MAGNETIC DIFFUSION AND FLARE ENERGY BUILDUP

	MAGNETIC DIFFUSION AND FLARE ENERGY BUILDUP
	WU, ST; YIN, CL; YANG, WH
刊名	SOLAR PHYSICS
	1992-12-01
卷号	142 期号:2 页码:313-325
ISSN号	0038-0938
英文摘要	Photospheric motion shears or twists solar magnetic fields to increase magnetic energy in the corona, because this process may change a current-free state of a coronal field to force-free states which carry electric current. This paper analyzes both linear and nonlinear two-dimensional force-free magnetic field models and derives relations of magnetic energy buildup with photospheric velocity field. When realistic data of solar magnetic field (B0 almost-equal-to 10(3) G) and photospheric velocity field (V(max) almost-equal-to 1 km s-1) are used, it is found that 3-4 hours are needed to create an amount of free magnetic energy which is of the order of the current-free field energy. Furthermore, the paper studies situations in which finite magnetic diffusivities in photospheric plasma are introduced. The shearing motion increases coronal region, while the photospheric diffusion reduces the energy. The variation of magnetic energy in the coronal region, then, depends on which process dominates.
学科主题	天文和天体物理
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	FIELDS ; REGION ; FLUX
收录类别	SCI
语种	英语
WOS记录号	WOS:A1992KB27100006
公开日期	2013-02-05
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/8544]
专题	紫金山天文台_期刊（老文献）
作者单位	PURPLE MT OBSERV,NANJING,PEOPLES R CHINA
推荐引用方式 GB/T 7714	WU, ST,YIN, CL,YANG, WH. MAGNETIC DIFFUSION AND FLARE ENERGY BUILDUP[J]. SOLAR PHYSICS,1992,142(2):313-325.
APA	WU, ST,YIN, CL,&YANG, WH.(1992).MAGNETIC DIFFUSION AND FLARE ENERGY BUILDUP.SOLAR PHYSICS,142(2),313-325.
MLA	WU, ST,et al."MAGNETIC DIFFUSION AND FLARE ENERGY BUILDUP".SOLAR PHYSICS 142.2(1992):313-325.