ournal of C osmology and A stroparticle hysics Probing galactic cosmic ray distribution with TeV gamma-ray sky
ournal of C osmology and A stroparticle hysics Probing galactic cosmic ray distribution with TeV gamma-ray sky
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宇宙学和宇宙粒子物理学杂志用 TeV 伽马射线天空探测银河系宇宙射线分布
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通讯作者：
H. Weber
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作者：
H. Weber
.宇宙线在银河系中的分布仍然不确定，这违背了对宇宙线与星际气体强子相互作用产生的弥散γ射线发射的期望。我们通过考虑宇宙射线分布的不同假设，包括最近出现的银河系内部宇宙射线谱指数下降的可能性，评估了TeV能量下的不同伽马射线辐射。来自银河系中心区域（即经度范围内）的弥散辐射|L| ≤ 60 μ m）的变化，在不同的情况下，由一个相对较大的因素，可以探测TeV尺度的伽马射线观测。通过比较HESS分辨的发散辐射和点源及扩展源产生的总辐射与Argo-YBJ、HESS、HAWC和Milagro观测到的γ射线辐射，我们发现实验数据已经可以区分不同的宇宙射线分布。如果考虑HESS未解决的源的贡献，则可以加强约束。
. The distribution of cosmic rays in the Galaxy is still uncertain and this affects the expectations for the diffuse gamma-ray emission produced by hadronic interactions of cosmic rays with the interstellar gas. We evaluate the diffuse gamma-ray flux at TeV energies by considering different assumptions for the cosmic ray distribution, including the recently emerged possibility of a decreasing cosmic ray spectral index in the inner Galaxy. The diffuse emission from the galactic central region (i.e. in the longitude range | l | ≤ 60 ◦ ) changes in the different scenarios by a relatively large factor and can be probed by TeV scale gamma-ray observations. By comparing the total flux produced by diffuse emission and point-like and extended sources resolved by HESS with the gamma-ray flux observed by Argo-YBJ, HESS, HAWC and Milagro, we show that experimental data can already discriminate among different hyphoteses for cosmic ray distribution. The constraints can be strengthened if the contribution of sources not resolved by HESS is taken into account.