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Precise measurements of the cosmic ray proton energy spectrum in the knee region

文献类型：期刊论文

作者Cao, Zhen35,36,37; Aharonian, F.2,3,4,37; Bai, Y.X.35,37; Bao, Y.W.5; Bastieri, D.6; Bi, X.J.35,36,37; Bi, Y.J.35,37; Bian, W.5; Bukevich, A.V.7; Cai, C.M.8
刊名SCIENCE BULLETIN
出版日期2025-12-30
卷号70期号:24页码:4173-4180
关键词Proton spectrum Cosmic rays Large High Altitude Air Shower Observatory Cosmic ray knee
ISSN号2095-9273
DOI10.1016/j.scib.2025.10.048
产权排序第26完成单位
文献子类Article
英文摘要We report the high-purity identification of cosmic-ray (CR) protons and a precise measurement of their energy spectrum from 0.15 to 12 PeV using the Large High Altitude Air Shower Observatory (LHAASO). Abundant event statistics, combined with the simultaneous detection of electrons/photons, muons, and Cherenkov light in air showers, enable spectroscopic measurements with statistical and systematic precision comparable to satellite data at lower energies. The proton spectrum shows significant hardening relative to low-energy extrapolations, culminating at 3 PeV, followed by sharp softening. This distinct spectral structure closely aligned with the knee in the all-particle spectrum points to the emergence of a new CR component at PeV energies that might be linked to the dozens of PeVatrons recently discovered by LHAASO, and offers crucial clues to the origin of Galactic cosmic rays. (c) 2025 The Authors. Published by Elsevier B.V. and Science China Press. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
学科主题天文学 ; 天体物理学 ; 高能天体物理学 ; 星系与宇宙学
URL标识查看原文
出版地RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS
WOS关键词ELEMENTAL GROUPS
资助项目National Key R&D Program of China[2024YFA1611401]; National Key R&D Program of China[2024YFA1611402]; National Key R&D Program of China[2024YFA1611403]; National Key R&D Program of China[2024YFA1611404]; National Natural Science Foundation of China[12393851]; National Natural Science Foundation of China[12393852]; National Natural Science Foundation of China[12393853]; National Natural Science Foundation of China[12393854]; National Natural Science Foundation of China[12205314]; National Natural Science Foundation of China[12105301]; National Natural Science Foundation of China[12305120]; National Natural Science Foundation of China[12261160362]; National Natural Science Foundation of China[12105294]; National Natural Science Foundation of China[U1931201]; National Natural Science Foundation of China[12375107]; National Natural Science Foundation of China[12275280]; National Natural Science Foundation of China[12105293]; National Natural Science Foundation of China[11905240]; National Natural Science Foundation of China[12375106]; National Natural Science Foundation of China[12261141691]; Innovation Project of IHEP[E25451U2]; Sichuan Province Science Foundation for Distinguished Young Scholars[2022JDJQ0043]; Youth Innovation Promotion Association of the Chinese Academy of Sciences (CAS YIPA)[2023019]; Thailand's National Science and Technology Development Agency (NSTDA); National Research Council of Thailand (NRCT) under the High-Potential Research Team Grant Program[N42A650868]; Chengdu Management Committee of Tianfu New Area
WOS研究方向Science & Technology - Other Topics
语种英语
WOS记录号WOS:001666611300001
出版者ELSEVIER
资助机构National Key R&D Program of China[2024YFA1611401, 2024YFA1611402, 2024YFA1611403, 2024YFA1611404] ; National Natural Science Foundation of China[12393851, 12393852, 12393853, 12393854, 12205314, 12105301, 12305120, 12261160362, 12105294, U1931201, 12375107, 12275280, 12105293, 11905240, 12375106, 12261141691] ; Innovation Project of IHEP[E25451U2] ; Sichuan Province Science Foundation for Distinguished Young Scholars[2022JDJQ0043] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences (CAS YIPA)[2023019] ; Thailand's National Science and Technology Development Agency (NSTDA) ; National Research Council of Thailand (NRCT) under the High-Potential Research Team Grant Program[N42A650868] ; Chengdu Management Committee of Tianfu New Area
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/28845]  
专题云南天文台_丽江天文观测站（南方基地）
通讯作者Lipari, P.; Yao, Z.G.; Yin, N.; Zhang, R.
作者单位1.Key Laboratory of Dark Matter and Space Astronomy & Key Laboratory of Radio Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, China;
2.University of Science and Technology of China, Hefei 230026, China;
3.Yerevan State University, Yerevan 0025, Armenia;
4.Max-Planck-Institut for Nuclear Physics, Heidelberg 69029, Germany;
5.Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China;
6.Center for Astrophysics, Guangzhou University, Guangzhou 510006, China;
7.Institute for Nuclear Research of Russian Academy of Sciences, Moscow 117312, Russia;
8.School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, Chengdu 610031, China;
9.State Key Laboratory of Particle Detection and Electronics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China;
10.School of Physics and Technology, Nanjing Normal University, Nanjing 210023, China;
推荐引用方式
GB/T 7714		 Cao, Zhen,Aharonian, F.,Bai, Y.X.,et al. Precise measurements of the cosmic ray proton energy spectrum in the knee region[J]. SCIENCE BULLETIN,2025,70(24):4173-4180.
APA Cao, Zhen.,Aharonian, F..,Bai, Y.X..,Bao, Y.W..,Bastieri, D..,...&Zuo, X..(2025).Precise measurements of the cosmic ray proton energy spectrum in the knee region.SCIENCE BULLETIN,70(24),4173-4180.
MLA Cao, Zhen,et al."Precise measurements of the cosmic ray proton energy spectrum in the knee region".SCIENCE BULLETIN 70.24(2025):4173-4180.

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