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DEPENDENCE OF THE ANOMALOUS RESISTIVITY ON THE INDUCED ELECTRIC FIELD IN SOLAR FLARES
Wu, Guiping1; Huang, Guangli2; Ji, Haisheng2
2010-09-01
发表期刊ASTROPHYSICAL JOURNAL
卷号720期号:1页码:771-775
摘要Anomalous resistivity is a critical parameter for triggering the fast magnetic reconnection and interpreting the eruption of solar flares in the nearly collisionless coronal plasma. However, the mechanism for the production of anomalous resistivity and its evolution are weakly understood. In this paper, the one-dimensional Vlasov equation was numerically solved with the typical solar coronal parameters and realistic mass ratio in the presence of strong inductive electric field, and the relationship between the anomalous resistivity and the reconnecting electric field was inferred for the area near the center of reconnecting current sheets. Our principal findings are summarized as follows. (1) The relationship between the anomalous resistivity and the reconnecting electric field E(0) may be represented by eta(eff) = [10.82-10.99 exp (-0.36 E(0))]Omega m. (2) If E(0) is small enough, it may be described by eta(eff) = [4.02 E(0) - 0.18]Omega m, which is basically consistent with the early experimental results on the plasma response to the applied electric field. (3) In comparison with theoretical formulas for the current-driven ion-acoustic and Buneman anomalous resistivities, if E(0) is small, the anomalous resistivity may be due to the ion-acoustic instability; if E(0) is large, the anomalous resistivity may be due to the Buneman instability. These results are also basically consistent with early experiments.
文章类型Article
关键词Acceleration Of Particles Sun: Flares Turbulence
WOS标题词Science & Technology ; Physical Sciences
DOI10.1088/0004-637X/720/1/771
关键词[WOS]RECONNECTING CURRENT SHEETS ; ION-ACOUSTIC RESISTIVITY ; MAGNETIC RECONNECTION ; PARTICLE-ACCELERATION ; 2-RIBBON FLARES ; PLASMA ; TURBULENCE ; SIMULATION ; EVOLUTION ; EMISSION
收录类别SCI
语种英语
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000281596000066
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文献类型期刊论文
条目标识符http://libir.pmo.ac.cn/handle/332002/15945
专题太阳活动的多波段观测研究团组
作者单位1.Southeast Univ, Dept Phys, Nanjing 210096, Jiangsu, Peoples R China
2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
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Wu, Guiping,Huang, Guangli,Ji, Haisheng. DEPENDENCE OF THE ANOMALOUS RESISTIVITY ON THE INDUCED ELECTRIC FIELD IN SOLAR FLARES[J]. ASTROPHYSICAL JOURNAL,2010,720(1):771-775.
APA Wu, Guiping,Huang, Guangli,&Ji, Haisheng.(2010).DEPENDENCE OF THE ANOMALOUS RESISTIVITY ON THE INDUCED ELECTRIC FIELD IN SOLAR FLARES.ASTROPHYSICAL JOURNAL,720(1),771-775.
MLA Wu, Guiping,et al."DEPENDENCE OF THE ANOMALOUS RESISTIVITY ON THE INDUCED ELECTRIC FIELD IN SOLAR FLARES".ASTROPHYSICAL JOURNAL 720.1(2010):771-775.
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