| The Influence of Ion-Acoustic Turbulence on the Electron Acceleration in the Reconnecting Current Sheet |
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| 作者姓名： | Gui-Ping Wu Guang-Li Huang and Yu-Hua Tang |
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| 作者单位： | Gui-Ping Wu，Guang-Li Huang and Yu-Hua TangDepartment of Physics，Southeast University，Nanjing 210096; Purple Mountain Observatory，Chinese Academy of Sciences，Nanjing 210008Department of Astronomy，Nanjing University，Nanjing 210093 |
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| 基金项目： | SupportedbytheNationalNaturalScienceFoundationofChina. |
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| 摘 要： | Through solving the single electron equation of motion and the Fokker-Planck equation including the terms of electric field strength and ion-acoustic turbulence, we study the influence of the ion-acoustic wave on the electron acceleration in turbulent reconnecting current sheets. It is shown that the ion-acoustic turbulence which causes plasma heating rather than particle acceleration should be considered. With typical parameter values, the acceleration time scale is around the order of 10^-6 s, the accelerated electrons may have approximately a power-law distribution in the energy range 20 ～100 keV and the spectral index is about 3～10, which is basically consistent with the observed hard X-ray spectra in solar flares.
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| 关 键 词： | 太阳风 湍流 粒子加速 X-射线 伽玛射线 |
The Influence of Ion-Acoustic Turbulence on the Electron Acceleration in the Reconnecting Current Sheet |
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| Gui-Ping Wu,Guang-Li Huang and Yu-Hua Tang.The Influence of Ion-Acoustic Turbulence on the Electron Acceleration in the Reconnecting Current Sheet[J].Chinese Journal of Astronomy and Astrophysics,2005,5(1):99-109. |
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| Authors: | Gui-PingWu Guang-LiHuang Yu-HuaTang |
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| Institution: | [1]DepartmentofPhysics,SoutheastUniversity,Nanjing210096 [2]PurpleMountainObservatory,ChineseAcademyofSciences,Nanjing210008 [3]DepartmentofAstronomy,NanjingUniversity,Nanjing210093 |
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| Abstract: | Through solving the single electron equation of motion and the Fokker Planck equation including the terms of electric field strength and ion-acoustic turbulence, we study the influence of the ion-acoustic wave on the electron acceleration in turbulent reconnecting current sheets. It is shown that the ion-acoustic turbulence which causes plasma heating rather than particle acceleration should be considered. With typical parameter values, the acceleration time scale is around the order of 10-6 s, the accelerated electrons may have approximately a power-law distribution in the energy range 20-100 keV and the spectral index is about 3-10, which is basically consistent with the observed hard X-ray spectra in solar flares. |
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| Keywords: | turbulence - acceleration of particles - Sun: X-rays gamma rays |
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