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

doi:10.1007/s11467-019-0946-8

	Implications on the origin of cosmic rays in light of 10 TV spectral softenings
	Yue, Chuan 1; Ma, Peng-Xiong 1,2; Yuan, Qiang 1,2,3; Fan, Yi-Zhong 1,2; Chen, Zhan-Fang 1,2; Cui, Ming-Yang 1; Dai, Hao-Ting 4; Dong, Tie-Kuang 1; Huang, Xiaoyuan 1; Jiang, Wei 1,2
刊名	FRONTIERS OF PHYSICS
	2019-12-23
卷号	15 期号:2 页码:9
关键词	cosmic rays
ISSN号	2095-0462
DOI	10.1007/s11467-019-0946-8
通讯作者	Yuan, Qiang(yuanq@pmo.ac.cn) ; Fan, Yi-Zhong(yzfan@pmo.ac.cn)
英文摘要	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.
资助项目	National Key Research and Development Program of China[2016YFA0400200] ; National Natural Science Foundation of China[11722328] ; National Natural Science Foundation of China[11525313] ; National Natural Science Foundation of China[U1738205] ; National Natural Science Foundation of China[11851305] ; 100 Talents Program of Chinese Academy of Sciences
WOS关键词	ENERGY-SPECTRA ; DEPENDENT PROPAGATION ; ELEMENTAL GROUPS ; ANISOTROPY ; KNEE ; COMPONENT ; PROTON ; RANGE ; MODEL
WOS研究方向	Physics
语种	英语
出版者	HIGHER EDUCATION PRESS
WOS记录号	WOS:000511738700001
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China ; 100 Talents Program of Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/141663]
专题	中国科学院近代物理研究所
通讯作者	Yuan, Qiang; Fan, Yi-Zhong
作者单位	1.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210033, Peoples R China 2.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Peoples R China 3.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China 4.Univ Sci & Technol China, State Key Lab Particle Detect & Elect, Hefei 230026, Peoples R China 5.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China 6.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Yue, Chuan,Ma, Peng-Xiong,Yuan, Qiang,et al. Implications on the origin of cosmic rays in light of 10 TV spectral softenings[J]. FRONTIERS OF PHYSICS,2019,15(2):9.
APA	Yue, Chuan.,Ma, Peng-Xiong.,Yuan, Qiang.,Fan, Yi-Zhong.,Chen, Zhan-Fang.,...&Zhang, Yun-Long.(2019).Implications on the origin of cosmic rays in light of 10 TV spectral softenings.FRONTIERS OF PHYSICS,15(2),9.
MLA	Yue, Chuan,et al."Implications on the origin of cosmic rays in light of 10 TV spectral softenings".FRONTIERS OF PHYSICS 15.2(2019):9.