论文标题
GEV-TEV粒子成分和中央分子区域宇宙射线的屏障
A GeV-TeV particle component and the barrier of cosmic-ray sea in the Central Molecular Zone
论文作者
论文摘要
宇宙射线是许多基本物理问题的重要探针，例如极端天体物理环境中高能量颗粒的加速度。银河系中心被广泛预期将是重要的宇宙射线来源，并且某些成像大气Cherenkov望远镜的观察确实成功地揭示了银河系中心附近Tev-Pev宇宙射线的一部分。在这里，我们报告了中央分子区域中GEV-TEV宇宙射线的鉴定，对费米大面积望远镜的$γ$ - 射线观察结果，其频谱和空间梯度与成像大气中的cherenkov望远镜相比，该镜头的频谱和空间梯度是一致的，但与相应的宇宙范围相比，相应的宇宙范围均具有相对较低的速度，这是相应的宇宙 - 均匀的群体构造，而宇宙式的均可构成的范围如此之高。银河中心的能量颗粒加速器以及可以有效抑制粒子从宇宙射线海到中央分子区域的质量的屏障存在。
Cosmic rays are important probe of a number of fundamental physical problems such as the acceleration of high and very high energy particles in extreme astrophysical environments. The Galactic center is widely anticipated to be an important cosmic-ray source and the observations of some Imaging Atmospheric Cherenkov Telescopes did successfully reveal a component of TeV-PeV cosmic rays in the vicinity of the Galactic center. Here we report the identification of GeV-TeV cosmic rays in the central molecular zone with the $γ$-ray observations of the Fermi Large Area Telescope, whose spectrum and spatial gradient are consistent with that measured by the Imaging Atmospheric Cherenkov Telescopes but the corresponding cosmic-ray energy density is substantially lower than the so-called cosmic-ray sea component, suggesting the presence of a high energy particle accelerator at the Galactic center and the existence of a barrier that can effectively suppress the penetration of the particles from the cosmic-ray sea to the central molecular zone.
