标题： 宇宙射线谱硬化的来源注入谱色散效应 显示英文标题

标题： Cosmic ray spectral hardening due to dispersion of source injection spectra

摘要： 宇宙射线（CR）能量谱的测量结果，使用ATIC、CREAM和PAMELA显示，在几百GV的刚度范围内存在显著的硬化现象。 我们提出这种硬化是由于一个源种群的谱的叠加，例如超新星遗迹（SNRs），其注入谱指数具有分散性。 采用适当的模型参数，观测数据可以得到很好的解释。 有趣的是，注入源参数与从SNRs的伽马射线观测中得出的参数相似，这可能支持CR起源于SNRs。 此外，这种机制提供了对超高能CR谱的“脚踝截止”结构的另一种解释。 显示英文摘要

摘要： The cosmic ray (CR) energy spectra measured with ATIC, CREAM and PAMELA showed that there is remarkable hardening for rigidity of several hundred GV. We propose that this hardening is due to the superposition of spectra from a population of sources, e.g., supernova remnants (SNRs), whose injection spectral indices have a dispersion. Adopting proper model parameters the observational data can be well explained. It is interesting that the injection source parameters are similar with that derived from gamma-ray observations of SNRs, which may support the SNR-origin of CRs. Furthermore this mechanism provides an alternative explanation of the "ankle-cutoff" structure of the ultra high energy CR spectra.