论文标题
活跃的银河核作为超高能宇宙射线的潜在来源
Active Galactic Nuclei as potential Sources of Ultra-High Energy Cosmic Rays
论文作者
论文摘要
活跃的银河核（AGN）及其相对论喷气机属于最有前途的超高能量宇宙射线（UHECR）加速器。这项紧凑的评论总结了最近的工具的基本实验发现，并讨论了对源能量学的可能解释和天体物理限制。特别关注AGN中UHECR加速度的潜在位点和机制，包括接近黑洞的间隙型颗粒加速度，以及在大型Jets中的反相关冲击和随机剪切粒子加速器时的一阶费米加速度。有人认为，鉴于我们当前的理解，最后两个代表了最有前途的机制，并且附近的fr〜i型射电星系为UHECR加速提供了合适的环境。
Active Galactic Nuclei (AGNs) and their relativistic jets belong to the most promising class of ultra-high-energy cosmic ray (UHECR) accelerators. This compact review summarises basic experimental findings by recent instruments, and discusses possible interpretations and astrophysical constraints on source energetics. Particular attention is given to potential sites and mechanisms of UHECR acceleration in AGNs, including gap-type particle acceleration close to the black hole, as well as first-order Fermi acceleration at trans-relativistic shocks and stochastic shear particle acceleration in large-scale jets. It is argued that the last two represent the most promising mechanisms given our current understanding, and that nearby FR~I type radio galaxies provide a suitable environment for UHECR acceleration.
