论文标题
100 TEV伽玛射线数据中PEVATRON周围各向异性扩散的签名
Signatures of anisotropic diffusion around PeVatrons in 100 TeV gamma-ray data
论文作者
论文摘要
西藏AS $γ$ Collaboration报告了银河平面的弥漫性$γ$ ray发射信号。我们认为，最高能量的外银河平面发射的可能性是由宇宙射线从银河系的局部或珀尔修斯臂中传播的宇宙射线产生的。我们表明，沿银河磁场的多PEV宇宙射线的各向异性扩散可以在天空上产生跨越十个度的扩展源，并具有与$γ$测量值一致的每一个单位 - 单位固体 - 固体 - 固体。可以使用这种新型非常扩展的来源的观察以及其形态的测量值来表征PEV宇宙射线在银河磁场中的各向异性扩散，并限制过去PEVATRON的位置和特性。
The Tibet AS$γ$ collaboration has reported a diffuse $γ$-ray emission signal from the Galactic Plane. We consider the possibility that the diffuse emission from the outer Galactic Plane at the highest energies is produced by cosmic rays spreading from a single supernova-type source either in the Local or Perseus arm of the Milky Way. We show that anisotropic diffusion of multi-PeV cosmic rays along the Galactic magnetic field can produce an extended source spanning ten(s) of degrees on the sky, with a flux-per-unit-solid-angle consistent with Tibet AS$γ$ measurements. Observations of this new type of very extended sources, and measurements of their morphologies, can be used to characterize the anisotropic diffusion of PeV cosmic rays in the Galactic magnetic field, and to constrain the locations and properties of past PeVatrons.
