摘要
提出了一个太阳脉冲和经变耀斑中高能太阳宇宙线电子能谱的形成模型，探讨了高能电子通过日冕捕获区的库仑损失、轫致辐射和同步辐射等物理过程，首次研究了日冕等离子体尾场对太阳宇宙线电子的加速及其能谱的形成．所得结果和观测谱能很好地符合，从而较合理地阐明了脉冲耀斑和经变耀斑两类太阳宇宙线高能电子谱的结构．
A model for the formation of energy spectrum of relativistic electrons in impulsive and long-duration solar flares is proposed. Coulomb energy losses, bremsstralung radiation and gyrosynchrotron radiation produced by the electrons through the corona ground plasma are discussed. The theory of coronal plasma wake field acceleration to include Coulomb energy losses,which is important among the three energy losses, is proposed. The results are obtained to successfully explain both the observed steeping of electron spectra below a few MeV following impulsive solar flares taking place at low coronal heights and the power law spectra of electrons in long-duration solar flares occurring in high coronal heights. It also can explain the reason for the observed spectral differences of relativistic electrons in impulsive and long-duration flares.
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
1996年第2期145-151,共7页
Chinese Journal of Geophysics
基金
国家自然科学基金
