标题： 关于银河系中心区域宇宙射线分布的新见解：来自H.E.S.S的研究 显示英文标题

标题： On the cosmic-ray distribution in the Galactic Center region: New insights from H.E.S.S

摘要： 我们使用H.E.S.S.伽马射线数据对银河系中心区域的弥散辐射进行了光谱形态分析。 我们依靠模板来模拟弥散辐射（银河系中心脊和前景成分），并采用三维似然拟合方法。 我们首先通过研究宇宙射线分布的1/r轮廓可能的偏离以及银河系中心脊内的潜在能谱变化，评估了银河系中心附近连续注入情景的有效性。 我们发现，数据可以适当由一个位于银河系中心附近的稳定源持续注入宇宙射线的场景来描述，这些宇宙射线通过中心分子区扩散。 然后我们推导了银河系中心脊辐射的最佳拟合能谱参数，并发现大约在10-20 TeV附近存在能谱转变。 显示英文摘要

摘要： We performed a spectro-morphological analysis of the diffuse emission in the Galactic center region with H.E.S.S. gamma-ray data. We relied on templates to model the diffuse emissions (the Galactic center ridge and the foreground component) and on a 3D likelihood fitting approach. We first assessed the validity of a continuous injection scenario near the Galactic center by investigating possible deviations from a 1/r profile of the cosmic-ray distribution and potential spectral variations within the Galactic center ridge. We found the data can appropriately be described by a scenario in which a steady source near the Galactic center continuously injects cosmic rays which diffuse through the Central Molecular Zone. We then derived the best-fit spectral parameters of the Galactic center ridge emission and we found a spectral transition near 10-20 TeV.