Perspective on the Cosmic-ray Electron Spectrum above TeV
Perspective on the Cosmic-ray Electron Spectrum above TeV
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DOI：
10.3847/1538-4357/aa5b93
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发表时间：
2016-11
期刊：
影响因子：
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通讯作者：
K. Fang;Bing-Bing Wang-Bing;X. Bi;Su-jie Lin;P. Yin
中科院分区：
文献类型：
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作者：
K. Fang;Bing-Bing Wang-Bing;X. Bi;Su-jie Lin;P. Yin
AMS-02以前所未有的精度测量了高达~ TeV的宇宙射线电子（加上正电子）光谱。光谱可以用幂律很好地描述，在10gev以上没有任何明显的特征。一年前发射的卫星仪器暗物质粒子探测器（DAMPE）将以高能分辨率测量高达10 TeV的电子能谱。超过TeV的宇宙电子可能是由一些局部宇宙射线源造成的，比如超新星残骸。因此，光谱特征，如截止和颠簸，可以预期在高能量。在这项工作中，我们对超TeV电子能谱的观点进行了仔细的研究。我们首先在AMS-02的最新轻子数据上检验我们的天体物理源模型，以给出一个自洽的图像。然后重点讨论了候选源，这些源可能是TeV以上的电子贡献者。根据局部源的性质（特别是船帆座的性质），DAMPE将来可能会在TeV以上的电子能谱中发现有趣的特征。
The AMS-02 has measured the cosmic-ray electron (plus positron) spectrum up to ∼TeV with unprecedented precision. The spectrum can be well described by a power law without any obvious features above 10 GeV. The satellite instrument Dark Matter Particle Explorer (DAMPE), which was launched a year ago, will measure the electron spectrum up to 10 TeV with high-energy resolution. The cosmic electrons beyond TeV may be attributed to few local cosmic-ray sources, such as supernova remnants. Therefore, spectral features, such as cut-off and bumps, can be expected at high energies. In this work, we provide a careful study on the perspective of the electron spectrum beyond TeV. We first examine our astrophysical source models on the latest leptonic data of AMS-02 to give a self-consistent picture. Then we focus on the discussion about the candidate sources, which could be electron contributors above TeV. Depending on the properties of the local sources (especially on the nature of Vela), DAMPE may detect interesting features in the electron spectrum above TeV in the future.