标题： 极高能量宇宙射线的起源 显示英文标题

标题： On The Origin of Very High Energy Cosmic Rays

摘要： 我们讨论了在理解最高能量下的宇宙射线加速和传播方面取得的最新进展。 特别地，我们将讨论集中在三个问题上：1）激波处粒子加速理论的发展；2）从银河系宇宙射线到星系际宇宙射线的过渡；3）最新观测结果对超高能宇宙射线（UHECRs）起源的影响。 显示英文摘要

摘要： We discuss the most recent developments in our understanding of the acceleration and propagation of cosmic rays up to the highest energies. In particular we specialize our discussion to three issues: 1) developments in the theory of particle acceleration at shock waves; 2) the transition from galactic to extragalactic cosmic rays; 3) implications of up-to-date observations for the origin of ultra high energy cosmic rays (UHECRs).