Cosmic ray spectral hardening due to dispersion of source injection spectra

机译：由于源注入光谱的分散而导致的宇宙射线光谱硬化

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

机译：用ATIC，CREAM和PAMELA测量的宇宙射线（CR）能量谱表明，对于数百GV的刚度，其硬化明显。我们认为这种强化是由于来自大量来源的光谱的叠加，例如超新星残留物（SNR），其注入光谱指数具有分散性。采用适当的模型参数可以很好地解释观测数据。有趣的是，注入源参数与从SNR的伽玛射线观测得出的参数相似，这可能支持CR的SNR起源。此外，该机制为超高能CR光谱的“踝部截止”结构提供了另一种解释。

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来源
《Proceedings of the 32nd International Cosmic Ray Conference》|2011年|1-4|共4页
会议地点 Beijing(CN)
作者
QIANG YUAN; BING ZHANG; XIAO-JUN BI;
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作者单位

Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049,China;

Department of Physics and Astronomy, University of Nevada Las Vegas, Las Vegas, NV 89154, USA;

Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049,China;

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原文格式 PDF
正文语种 eng
中图分类宇宙射线强度变化;
关键词
cosmic rays, energy spectra and composition, supernova remnants;

机译：宇宙射线，能谱和组成，超新星残余;

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2. Spectral hardening of cosmic ray protons and helium nuclei in supernova remnant shocks [J] . Wen-Hui Lin, Bi-Wen Bao, Ze-Jun Jiang, 中国物理C（英文版） . 2019,第005期

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3. On the knee of Galactic cosmic rays in light of sub-TeV spectral hardenings [J] . Yi-Qing Guo, Qiang Yuan 中国物理C（英文版） . 2018,第007期

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4. Cosmic ray spectral hardening due to dispersion of source injection spectra [C] . QIANG YUAN, BING ZHANG, XIAO-JUN BI International Cosmic Ray Conference . 2011

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Cosmic ray spectral hardening due to dispersion of source injection spectra

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