超高能宇宙线源于何处?  

Where are the origins of ultrahigh-energy cosmic rays?

作　　者：曹臻[1] 

机构地区：[1]中国科学院高能物理研究所,北京100049

出　　处：《科学通报》2016年第27期2967-2972,共6页Chinese Science Bulletin

摘　　要：讨论超高能宇宙线(UHECR)粒子的身世,即它们可能的出生地、可能的产生机制、到达我们的探测器之前它们可能的旅途长短和经历.人类对这方面的知识太有限,只能对我们的已有知识做一个总结,包括一个基于产生UHECR的必要条件而对一些天体的分类、实验上对于UHECR来自于银河系外的两个证据和与之伴随而来的难解之谜,并对未来的发展尤其是未来实验做一个展望.In this essay, the origin of ultrahigh-energy cosmic rays（UHECR） is discussed, including the possible celestial objects, possible accelerating mechanism and what possibly happened to them during the long journey before reach to our detectors on the ground. Since we have very limited knowledge about them, we only make a brief summary on（1） a categorization of celestial objects based on a necessary condition for the production of UHECRs,（2） two indirect evidences about the extra-galactic origins of UHECRin experiments, and（3） mysteries together with the latest progresses.We are out looking for future developments, particularly future experiments.

关 键 词：宇宙线源 银河外星系 宇宙线能谱 GZK截断 各向异性 

分 类 号：P172.4[天文地球—天文学]