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Numerical simulation of superhalo electrons generated by magnetic reconnection in the solar wind source region

文献类型：期刊论文

作者Yang, Li-Ping1,2; Wang, Ling-Hua1; He, Jian-Sen1; Tu, Chuan-Yi1; Zhang, Shao-Hua3; Zhang, Lei1; Feng, Xue-Shang2
刊名RESEARCH IN ASTRONOMY AND ASTROPHYSICS
出版日期2015-03-01
卷号15期号:3页码:348-362
关键词Acceleration Of Particles Methods: Numerical Sun: Particle Emission (Sun:) Solar Wind Sun: Transition Region
DOI10.1088/1674-4527/15/3/005
文献子类Article
英文摘要Superhalo electrons appear to be continuously present in the interplanetary medium, even during very quiet times, with a power-law spectrum at energies above similar to 2 keV. Here we numerically investigate the generation of superhalo electrons by magnetic reconnection in the solar wind source region, using magnetohydrodynamics and test particle simulations for both single X-line reconnection and multiple X-line reconnection. We find that the direct current electric field, produced in the magnetic reconnection region, can accelerate electrons from an initial thermal energy of T similar to 10(5) K up to hundreds of keV. After acceleration, some of the accelerated electrons, together with the nascent solar wind flow driven by the reconnection, propagate upwards along the newly-opened magnetic field lines into interplanetary space, while the rest move downwards into the lower atmosphere. Similar to the observed superhalo electrons at 1 AU, the flux of upward-traveling accelerated electrons versus energy displays a power-law distribution at similar to 2 - 100 keV, f (E) similar to E-delta, with a delta of similar to 1.5 - 2.4. For single (multiple) X-line reconnection, the spectrum becomes harder (softer) as the anomalous resistivity parameter alpha (uniform resistivity eta) increases. These modeling results suggest that the acceleration in the solar wind source region may contribute to superhalo electrons.
WOS关键词TEST PARTICLE-ACCELERATION ; CURRENT SHEETS ; ANOMALOUS RESISTIVITY ; CORONAL FUNNELS ; PROTON ACCELERATION ; POWER-LAW ; QUIET SUN ; FLARES ; FIELD ; ORIGIN
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000350680800005
资助机构National Natural Science Foundation of China (NSFC)(41274172 ; National Natural Science Foundation of China (NSFC)(41274172 ; NSFC(41304133 ; NSFC(41304133 ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; 41474148 ; 41474148 ; 41031066 ; 41031066 ; 41174148 ; 41174148 ; 41204127 ; 41204127 ; 40890162 ; 40890162 ; 41204105) ; 41204105) ; 41222032 ; 41222032 ; 40931055) ; 40931055) ; National Natural Science Foundation of China (NSFC)(41274172 ; National Natural Science Foundation of China (NSFC)(41274172 ; NSFC(41304133 ; NSFC(41304133 ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; 41474148 ; 41474148 ; 41031066 ; 41031066 ; 41174148 ; 41174148 ; 41204127 ; 41204127 ; 40890162 ; 40890162 ; 41204105) ; 41204105) ; 41222032 ; 41222032 ; 40931055) ; 40931055)
源URL[http://ir.iggcas.ac.cn/handle/132A11/62544]  
专题地质与地球物理研究所_其他部门
作者单位1.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China
2.Chinese Acad Sci, Ctr Space Sci & Appl Res, State Key Lab Space Weather, SIGMA Weather Grp, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Yang, Li-Ping,Wang, Ling-Hua,He, Jian-Sen,et al. Numerical simulation of superhalo electrons generated by magnetic reconnection in the solar wind source region[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2015,15(3):348-362.
APA Yang, Li-Ping.,Wang, Ling-Hua.,He, Jian-Sen.,Tu, Chuan-Yi.,Zhang, Shao-Hua.,...&Feng, Xue-Shang.(2015).Numerical simulation of superhalo electrons generated by magnetic reconnection in the solar wind source region.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,15(3),348-362.
MLA Yang, Li-Ping,et al."Numerical simulation of superhalo electrons generated by magnetic reconnection in the solar wind source region".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 15.3(2015):348-362.

入库方式： OAI收割

来源：地质与地球物理研究所

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