论文标题
限制ICM中宇宙射线质子的冲击加速度
Limiting the shock acceleration of cosmic-ray protons in the ICM
论文作者
论文摘要
大规模无线电排放的观察证明，在星系簇中存在冲击加速的宇宙射线电子，而缺乏检测到的$γ$ - 砂限制了银河系中宇宙射线质子的加速。这挑战了我们对扩散冲击加速度如何工作的理解。在这项工作中，我们将在批量内培养基中进行冲击加速的最新食谱与大型星系簇的最先进的磁流动力模拟。此外，我们使用被动示踪剂颗粒遵循加速宇宙射线的演变。我们表明，当考虑到磁场拓扑与加速宇宙射线的反馈之间的相互作用时，粒子加速理论的最新发展提供了与观察性约束兼容的结果。
Observations of large-scale radio emissions prove the existence of shock accelerated cosmic-ray electrons in galaxy clusters, while the lack of detected $γ$-rays limits the acceleration of cosmic-ray protons in galaxy clusters. This challenges our understanding of how diffusive shock acceleration works. In this work, we couple the most updated recipes for shock acceleration in the intracluster medium to state-of-the-art magneto-hydrodynamical simulations of massive galaxy clusters. Furthermore, we use passive tracer particles to follow the evolution of accelerated cosmic-rays. We show that when the interplay between magnetic field topology and the feedback from accelerated cosmic rays is taken into account, the latest developments of particle acceleration theory give results which are compatible with observational constraints.
