Implications on the origin of cosmic rays in light of 10 TV spectral softenings

作     者：Cliuan Yue Peng-Xiong Ma Qiang Yuan Yi-Zhong Fan Zhan-Fang Chen Ming-Yang Cui Hao-Ting Dai Tie-Kuang Dong Xiaoyuan Huang Wei Jiang Shi-Jun Lei Xiang Li Cheng-Ming Liu Hao Liu Yang Liu Chuan-Ning Luo Xu Pan Wen-Xi Peng Rui Qiao Yi-Feng Wei Li-Bo Wu Zhi-Hui Xu Zun-Lei Xu Guan-Wen Yuan Jing-Jing Zang Ya-Peng Zhang Yong-Jie Zhang Yun-Long Zhang Chuan Yue;Peng-Xiong Ma;Qiang Yuan;Yi-Zhong Fan;Zhan-Fang Chen;Ming-Yang Cui;Hao-Ting Dai;Tie-Kuang Dong;Xiaoyuan Huang;Wei Jiang;Shi-Jun Lei;Xiang Li;Cheng-Ming Liu;Hao Liu;Yang Liu;Chuan-Ning Luo;Xu Pan;Wen-Xi Peng;Rui Qiao;Yi-Feng Wei;Li-Bo Wu;Zhi-Hui Xu;Zun-Lei Xu;Guan-Wen Yuan;Jing-Jing Zang;Ya-Peng Zhang;Yong-Jie Zhang;Yun-Long Zhang

作者机构：Key Laboratory of Dark Matter and Space AstronomyPurple Mountain ObservatoryChinese Academy of SciencesNanjing 210033China School of Astronomy and Space ScienceUniversity of Science and Technology of ChinaHefei 230026China Center for High Energy PhysicsPeking UniversityBeijing 100871China State Key Laboratory of Particle Detection and ElectronicsUniversity of Science and Technology of ChinaHefei 230026China Key Laboratory of Particle AstrophysicsInstitute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Institute of Modem PhysicsChinese Academy of SciencesLanzhou 730000China 

出 版 物：《Frontiers of physics》 (物理学前沿（英文版）)

年 卷 期：2020年第15卷第2期

页      面：101-109,F0004页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：the Na-tional Key Research and Development Program of China(No.2016YFA0400200) the National Natural Science Foundation of China(Nos.11722328,11525313,U1738205,and 11851305) the 100 Talents Program of Chinese Academy of Sciences. 

主　　题：cosmic rays 

摘      要：Precise measurements of the energy spectra of cosmic rays(CRs)show various kinds of features deviating from single power-laws,which give very interesting and important implications on their origin and propagation.Previous measurements from a few balloon and space experiments indicate the existence of spectral softenings around 10 TV for protons(and probably also for Helium nuclei).Very recently,the DArk Matter Particle Explorer(DAMPE)measurement about the proton spectrum clearly reveals such a softening with a high significance.Here we study the implications of these new measurements,as well as the groundbased indirect measurements,on the origin of CRs.We find that a single component of CRs fails to fit the spectral softening and the air shower experiment data simultaneously.In the framework of multiple components,we discuss two possible scenarios,the multiple source population scenario and the background plus nearby source scenario.Both scenarios give reasonable fits to the wide-band data from TeV to 100 PeV energies.Considering the anisotropy observations,the nearby source model is favored.