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arXiv 0906.3156astro-ph.HE
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河外超高能cosmic-ray核的传播:对观测光谱和成分的影响

Propagation of extragalactic ultra-high energy cosmic-ray nuclei : implications for the observed spectrum and composition

D. Allard

摘要:

本文研究了宇宙线核和质子的传播。我们强调的影响源组成的预期光谱和地球上的成分,以及从银河系到河外宇宙射线的过渡现象和解释的脚踝。我们指出,不同的源组成模型不能区分的宇宙射线谱的唯一基础上,但$<X_{\max}>$的能量演化应消除这种简并。最后,我们比较了不同的源组成模型的预测与现有的数据,并讨论了我们的结果的影响。

英文摘要:

In this paper, we study the propagation of cosmic-ray nuclei and protons. We emphasize the influence of the source composition on the expected spectrum and composition on Earth as well as on the phenomenology of the transition from Galactic to extragalactic cosmic-rays and the interpretation of the ankle. We point out that the different source composition models cannot be distinguished on the sole basis of the cosmic-ray spectrum but that the the energy evolution of $<X_{\max}>$ should remove this degeneracy. Finally, we compare the predictions for the different source composition models with the available data and discuss the implications of our results.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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