| On the Evolution of the Lower Energy Cutoff of Nonthermal Electrons in Solar Flares |
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| 作者姓名： | Wei－QunGan You－PingLi 等 |
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| 作者单位： | Wei-Qun Gan，You-Ping Li and Jin Chang Purple Mountain Observatory，Chinese Academy of Sciences，Nanjing 210008 National Astronomical Observatories，Chinese Academy of Sciences，Beijing 100012 |
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| 基金项目： | 国家自然科学基金，科技部资助项目 |
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| 摘 要： | 1 INTRODUCTION Gan, Li and Chang (2001a) proposed a quantitative method to obtain the lower energycutoff (Er) of power-law electrons from the observed broken-down double power-law hard Xray spectrum. Most recently Can et al. (2002) improved the method and let it be moreself-consistent. They applied their improved method to the 54 hard X-ray events observed withBATSE/CGRO and acquired more general results in comparison with those obtained by Canet al. (2001b). Despite the data is rel…
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| 关 键 词： | 太阳 X射线 伽玛射线 耀斑 太阳粒子 |
On the Evolution of the Lower Energy Cutoff of Nonthermal Electrons in Solar Flares |
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| Wei-Qun Gan,You-Ping Li,Jin Chang.On the Evolution of the Lower Energy Cutoff of Nonthermal Electrons in Solar Flares[J].Chinese Journal of Astronomy and Astrophysics,2002,2(2):103-105. |
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| Authors: | Wei-Qun Gan You-Ping Li Jin Chang |
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| Institution: | [1]PurpleMountainObservatory,ChineseAcademyofSciences,Nanjing210008 [2]NationalAstronomicalObservatories,ChineseAcademyofSciences,Beijing100012 |
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| Abstract: | Using the method recently developed by Gan et al. (2001a,2002),We investigate the time variation of the lower energy cutoff (Ec) of nonthermal electrons for three BATSE/CGRO hard X-ray events. The result shows that Ec changes with time, from smaller before the peak flux, to larger at the peak, and then bakc to smaller after the peak. Such a variation of Ec, being a preliminary conclusion for the first time, should be checked in the future by using data with a higher energy resolution. |
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| Keywords: | Sun: hard X-rays - Sun: gamma-rays - Sun: flares - Sun: particles |
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