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MAGNETIC DIFFUSION AND FLARE ENERGY BUILDUP
WU, ST; YIN, CL; YANG, WH
1992-12-01
Source PublicationSOLAR PHYSICS
ISSN0038-0938
Volume142Issue:2Pages:313-325
AbstractPhotospheric 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.
Subject Area天文和天体物理
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordFIELDS ; REGION ; FLUX
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:A1992KB27100006
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/8544
Collection期刊(老文献)
AffiliationPURPLE MT OBSERV,NANJING,PEOPLES R CHINA
Recommended Citation
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.
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