论文标题
银河系伽马射线和中微子的发射来自相互作用的宇宙射线核
Galactic gamma-ray and neutrino emission from interacting cosmic-ray nuclei
论文作者
论文摘要
我们介绍了对超高能量（VHE）对超高能（UHE）伽马射线的期望（VHE）的期望，以及在我们的星系中相互作用的宇宙射线中的中微子发射，以及与银河系弥漫性发射的最新结果的比较。我们证明了正确考虑混合宇宙射线组成和伽马射线吸收的重要性。我们采用了核相互作用的受伤的核子模型，并提供了所得伽马射线和中微子产生的参数化。由于核内部的聚类而导致的核子屏蔽对伽马射线的产生具有可测量的影响，并且在混合组成颗粒光谱中尤其明显接近断裂和截止。宇宙射线光谱中“膝盖”周围组成的变化对弥漫性中微子和伽马射线发射光谱具有明显影响。我们表明，当前和近乎未来的探测器可以探测从10 TEV到1 PEV的关键能量范围内的这些差异，从而在整个银河系中测试了宇宙射线谱和组成的普遍性的范式。
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.
