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arXiv 2201.03984astro-ph.HE
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银河系gamma-ray和相互作用cosmic-ray核的中微子发射

Galactic gamma-ray and neutrino emission from interacting cosmic-ray nuclei

M. Breuhaus, J. A. Hinton, V. Joshi, B. Reville, H. Schoorlemmer

摘要:

我们提出了一个非常高的能量(VHE),超高能(UHE)的伽玛射线和中微子发射的预期在我们的银河系相互作用的宇宙射线的研究,以及比较的最新结果为银河系UHE漫发射。我们证明了适当占的混合宇宙射线成分和伽马射线吸收的重要性。我们采用核相互作用的受伤核子模型,并提供由此产生的γ射线和中微子生产的参数化。核子屏蔽由于集群内的核被证明有一个可测量的影响,对生产的伽马射线,特别是明显接近的混合组成的粒子光谱的休息和截止。宇宙射线谱中"膝"附近成分的变化对扩散中微子和伽马射线发射谱有明显的影响。我们表明,目前和不久的将来探测器可以探测这些差异的关键能量范围从10 TeV到1 PeV,测试宇宙射线光谱的普遍性和整个银河系的组成的范例。

英文摘要:

We present a study of the expectations for very-high-energy (VHE) to ultra-high-energy (UHE) gamma-ray and neutrino emission from interacting cosmic rays in our Galaxy as well as a comparison to the latest results for the Galactic UHE diffuse emission. We demonstrate the importance of properly accounting for both the mixed cosmic-ray composition and the gamma-ray absorption. We adopt the wounded-nucleon model of nucleus interactions and provide parameterisations of the resulting gamma-ray and neutrino production. Nucleon shielding due to clustering inside nuclei is shown to have a measurable effect on the production of gamma rays and is particularly evident close to breaks and cutoffs in mixed-composition particle spectra. The change in composition around the `knee' in the cosmic ray spectrum has a noticeable impact on the diffuse neutrino and gamma-ray emission spectra. We show that current and near-future detectors can probe these differences in the key energy range from 10 TeV to 1 PeV, testing the paradigm of the universality of the cosmic ray spectrum and composition throughout the Galaxy.

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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