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TRIGGERED MAGNETIC ENERGY-RELEASE IN SOLAR-FLARES
HU, YQ; LI, X; AI, GX
1995-10-01
Source PublicationASTROPHYSICAL JOURNAL
Volume451Issue:2Pages:843-850
AbstractA numerical simulation is presented in this paper in terms of a two-dimensional, dissipative MHD model, concerning the magnetic energy release of a local quadrupolar force-free field with a high current layer. It is assumed that anomalous resistive dissipation occurs when electric current density exceeds a certain critical value. The magnetic energy release obtained is largely divided into two stages. The first stage lasts 1-2 minutes, characterized by anomalous resistive dissipation in the high current layer. As a result, the plasma in that layer is heated to 2 x 10(6) K, B-z (the shear component of the magnetic field) decreases, and the magnetic field lines descend there. The descending field lines squeeze the separatrix below and cause a growth of current on it. When the current density exceeds the critical value, the second stage begins: anomalous resistive dissipation and magnetic reconnection take place across the separatrix and convert magnetic energy into thermal energy. Such a process proceeds in a chain manner, and the maximum temperature in the separatrix reaches 1.8 x 10(7) K in less than 10 minutes. The anomalous resistive dissipation in the high current layer in the first stage plays the role of trigger for the magnetic energy release of the force-free held in the second stage. We suggest that this is a possible mechanism for magnetic energy release associated with solar flares.
KeywordMhd Sun Corona Sun Flares Sun Magnetic Fields
Indexed BySCI
Language英语
WOS IDWOS:A1995RV62600041
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8349
Collection院士
AffiliationCHINESE ACAD SCI, BEIJING ASTRON OBSERV, BEIJING 100080, PEOPLES R CHINA
Recommended Citation
GB/T 7714
HU, YQ,LI, X,AI, GX. TRIGGERED MAGNETIC ENERGY-RELEASE IN SOLAR-FLARES[J]. ASTROPHYSICAL JOURNAL,1995,451(2):843-850.
APA HU, YQ,LI, X,&AI, GX.(1995).TRIGGERED MAGNETIC ENERGY-RELEASE IN SOLAR-FLARES.ASTROPHYSICAL JOURNAL,451(2),843-850.
MLA HU, YQ,et al."TRIGGERED MAGNETIC ENERGY-RELEASE IN SOLAR-FLARES".ASTROPHYSICAL JOURNAL 451.2(1995):843-850.
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