Cosmic rays are ultra-relativistic particles that slam into the atmosphere from all directions in the sky. Gamma rays emitted when cosmic rays interact with Galactic gas and radiation fields are a powerful tool to investigate their origin. Many candidate CR sources have been discovered in GeV-to-PeV gamma rays. However, the major contributors to the CR population, especially at the highest energies, are still unknown. We give here a state of the art report on the search for the sources of Galactic cosmic rays by means of gamma-ray astronomical methods.

中文翻译：

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用伽马射线天文学寻找银河PeVatrons

宇宙射线是超相对论的粒子，从天空的各个方向撞击大气层。当宇宙射线与银河气体和辐射场相互作用时发出的伽马射线是研究其起源的有力工具。在 GeV-to-PeV 伽马射线中发现了许多候选 CR 源。然而，CR 人口的主要贡献者，尤其是在最高能量时，仍然未知。我们在此提供一份关于通过伽马射线天文方法寻找银河宇宙射线源的最新报告。