论文标题
银河弥漫
Galactic diffuse gamma rays meet the PeV frontier
论文作者
论文摘要
西藏为$γ$和LHAASO合作最近报道了观察到$γ$ ray弥散的发射，而能量从银河平面到PEV。我们讨论了非均匀宇宙射线传输方案的相关性，以及这些结果对宇宙射线物理学的影响。我们使用{\ tt dragon}和{\ tt hermes}代码来构建该发射的高分辨率图和光谱分布，以在几种代表模型的情况下重现一组广泛的局部宇宙射线数据，最高为100 PEV。我们表明，西藏测得的能量光谱为$γ$，lhaaso，argo-ybj和fermi-lat在天空中几个感兴趣的区域中都可以一致地描述出银河宇宙射线“ SEA”所产生的发射。我们还表明，我们所有的型号都与Icetop $γ$ -Ray上限兼容。我们的结果有利于以空间依赖性扩散为特征的传输模型，尽管在运输方案的选择与10 TEV以上的宇宙射线光谱形状的选择之间仍然存在一些堕落。我们讨论即将进行的测量在解决这种歧义方面的作用。
The Tibet AS$γ$ and LHAASO collaborations recently reported the observation of a $γ$-ray diffuse emission with energy up to the PeV from the Galactic plane. We discuss the relevance of non-uniform cosmic-ray transport scenarios and the implications of these results for cosmic-ray physics. We use the {\tt DRAGON} and {\tt HERMES} codes to build high-resolution maps and spectral distributions of that emission for several representative models under the condition that they reproduce a wide set of local cosmic-ray data up to 100 PeV. We show that the energy spectra measured by Tibet AS$γ$, LHAASO, ARGO-YBJ and Fermi-LAT in several regions of interest in the sky can all be consistently described in terms of the emission arising by the Galactic cosmic-ray "sea". We also show that all our models are compatible with IceTop $γ$-ray upper limits. Our results favor transport models characterized by spatial-dependent diffusion although some degeneracy remains between the choice of the transport scenario and that of the cosmic-ray spectral shape above 10 TeV. We discuss the role of forthcoming measurements in resolving that ambiguity.
