THE INFLUENCE OF KLEIN–NISHINA STEPS ON THE SPATIAL DIFFUSION OF GALACTIC COSMIC-RAY ELECTRONS
THE INFLUENCE OF KLEIN–NISHINA STEPS ON THE SPATIAL DIFFUSION OF GALACTIC COSMIC-RAY ELECTRONS
复制标题
克莱因-仁科台阶对银河宇宙线电子空间扩散的影响
DOI：
10.1088/0004-637x/751/1/71
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
R. Schlickeiser
中科院分区：
文献类型：
--
作者：
P. Blies;R. Schlickeiser
电子逆康普顿散射相互作用的完整克莱因-仁科截面意味着，当电子能量超过临界克莱因-仁科能量 EK = 0.27m2ec4/(kBT) 时，与汤姆逊极限相比，电子能量损失率显着降低，其中 T 表示光子灰体分布的温度。我们研究了克莱因-仁科还原对相对论电子稳态空间扩散输运方程求解的影响。能量低于 104 GeV 时的修正电子谱，其中仅来自星际光学目标光子的克莱因-尼科修正是相关的，是根据一维、二维和三维空间扩散的格林函数解导出的。针对单能电子的单点源计算一维和三维扩散方程解的修改。结果表明，当电子能量大于临界克莱因-仁科能量 EK 时，局域电子强度显着增强，并且由单个稳定点源引起的太阳系宇宙射线电子各向异性在 EK 附近表现出急剧下降。这些克莱因-仁科增强对于确定点源（例如暗物质源和/或电磁粒子加速器（脉冲星和微类星体））对局部电子强度和局部正电子分数的贡献可能很有趣。
The full Klein–Nishina cross section for the inverse Compton scattering interactions of electrons implies a significant reduction of the electron energy loss rate compared to the Thomson limit when the electron energy exceeds the critical Klein–Nishina energy EK = 0.27m2ec4/(kBT), where T denotes the temperature of the photon graybody distribution. We investigate the influence of the Klein–Nishina reduction on the solution of the steady-state spatial diffusion transport equation for relativistic electrons. The modified electron spectrum at energies below 104 GeV, where only the Klein–Nishina modifications from interstellar optical target photons are relevant, are derived in terms of the Green's function solution for one-, two-, and three-dimensional spatial diffusion. The modifications to the solutions of the one- and three-dimensional diffusion equations are calculated for a single point source of monoenergetic electrons. It is shown that significant enhancements in the local electron intensity occur at electron energies greater than the critical Klein–Nishina energy EK, and that the cosmic-ray electron anisotropy at the solar system resulting from a single steady point source exhibits a sharp drop near EK. These Klein–Nishina enhancements are potentially interesting for determining the contribution of point sources such as dark matter sources and/or electromagnetic particle accelerators (pulsars and micro-quasars) to the local electron intensity and the local positron fraction.
影响因子：
8.6
作者：
F. Aharonian;A. Akhperjanian;U. Barres de Almeida;A. R. Bazer-Bachi;Y. Becherini;B. Behera;W. Benbow-W.-Ben
通讯作者：
F. Aharonian;A. Akhperjanian;U. Barres de Almeida;A. R. Bazer-Bachi;Y. Becherini;B. Behera;W. Benbow-W.-Ben