论文标题
来自各向异性电子分布的Electron Enermon Energy Ensumpra和E-E Bremsstrahlung在极端太阳耀斑中
Electron Energy Spectra and e-e Bremsstrahlung from Anisotropic Electron Distributions in Extreme Solar Flares
论文作者
论文摘要
我们研究了两个强大的太阳耀斑SOL2003-10-28T 11:06:16（GOOS X17.2）和SOL2002-07-23T00：18：16（x4.8）的电子能光谱。电子电子（E-E）bremsstrahlung在500 KEV以上的能量下对X射线通量做出了重要贡献。在X射线通量计算中，考虑了不同的电子音调分布：准透明和准宽术。结果表明，在准光谱差异差异$ε\大约100 $ keV上发生在硬X射线光谱中，具有光子光谱差异$δγ\ ge 1 $在准钟形节间各向异性和硬性幂律电子能量光谱的情况下。我们从Rhessi数据中推断出非热电子能量光谱的参数，以根据2003年10月28日和2002年7月23日的极端太阳耀斑。在包括E-E-E Bremsstrahlung之后，可以使用较厚目标模型中获得的非热电子电子能量光谱，可以使用peastex $δ\δ\ exex $δ\近约5 $。在2002年7月23日的耀斑中，从100 KEV以上的能量开始，向南部的脚尖有明显的不对称性。高于100 keV的能量的HXR源的分离可能与耀斑环中相对论电子传输的特征有关。
We study the electron energy spectra of two powerful solar flares SOL2003-10-28T 11:06:16 (GOES class X17.2) and SOL2002-07-23T00:18:16 (X4.8) on the basis of HXR and gamma-ray spectra obtained from RHESSI data. Electron-electron (e-e) bremsstrahlung makes a significant contribution to the X-ray flux at energies above 500 keV. In X-ray flux calculations different electron pitch-angle distributions were considered: quasi-transverse and quasi-longitudinal. It was shown that breaks in hard X-ray spectra occur on energies $ε\approx100$ keV with photon spectral-index difference $Δγ\ge 1$ in the case of quasi-longitudinal anisotropy and hard power-law electron energy spectra. We deduce the parameters of non-thermal electrons energy spectra from RHESSI data for the extreme solar flares of 2003 October 28 and 2002 July 23. After including e-e bremsstrahlung, the non-thermal electrons energy spectra obtained in the thick-target model can be fitted using power-law with spectral index $δ\approx 5$. For the 2002 July 23 flare, there is a pronounced asymmetry towards the southern footpoint, starting from energies above 100 keV. The separation of HXR sources at energies above 100 keV may be related to a feature of relativistic electron transport in flaring loops.
