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arXiv 2210.09591astro-ph.HE
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基于B/C和B/O比值的DAMPE测量的银道面新cosmic ray的证据

Evidence of fresh cosmic ray in galactic plane based on DAMPE measurement of B/C and B/O ratios

Pei-Pei Zhang, Xin-Yu He, Wei Liu, Yi-Qing Guo

摘要:

越来越多的实验表明,初级和次级宇宙线的能谱在$\sim 200$ GV以上都表现出硬化。最近,DAMPE实验报告了在$200$ GV下硼碳比的硬化。这些迹象要求修改传统的宇宙射线(CR)图片。在这项工作中,我们提出了多核次级宇宙射线,如硼,反质子,起源于强子相互作用的新加速的宇宙射线与星际气体附近的源。我们发现,次级与初级的比例,例如,硼碳,硼氧和反质子质子比,可以很好地描述。电子和正电子的测量也可以解释。

英文摘要:

More and more experiments have identified that the energy spectra of both primary and secondary cosmic-rays exhibit a hardening above $\sim 200$ GV. Most recently, the DAMPE experiment has reported a hardening of boron-to-carbon ratio at $200$ GV. These signs call for modifications of the conventional cosmic-ray (CR) picture. In this work, we propose that the plethoric secondary cosmic rays, for example, boron, antiprotons, originate from the hadronic interactions of freshly accelerated cosmic rays with the interstellar gas near the sources. We find that secondary-to-primary ratios, for example, boron-to-carbon, boron-to-oxygen and antiproton-to-proton ratios, could be well described. The measurements of electrons and positrons could also be accounted for.

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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