中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 云南天文台
  3. 中国科学院云南天文台
  4. 丽江天文观测站（南方基地）
Precise Measurement of the Cosmic Ray Helium Spectrum above 0.1 PeV

文献类型：期刊论文

作者Cao, Zhen2,3,4; Aharonian, F.4,5,6,7; Bai, Y. X.2,4; Bao, Y. W.8; Bastieri, D.9; Bi, X. J.2,3,4; Bi, Y. J.2,4; Bian, W.8; Blunier, J.10; Blunier, J.10
刊名PHYSICAL REVIEW LETTERS
出版日期2026-03-26
卷号136期号:12
ISSN号0031-9007
DOI10.1103/d838-49gt
产权排序第26完成单位
文献子类Article
英文摘要We report a measurement of the cosmic ray helium energy spectrum in the energy interval 0.16-13 PeV, derived by subtracting the proton spectrum from the light component (proton and helium) spectrum obtained with observations made by the Large High Altitude Air Shower Observatory (LHAASO) under a consistent energy scale. The helium spectrum shows a significant hardening centered at E similar or equal to 1.1 PeV, followed by a softening at similar to 7 PeV, indicating the appearance of a helium knee. Comparing the proton and helium spectra in the LHAASO energy range reveals some remarkable facts. In the lower part of this range, in contrast to the behavior at lower energies, the helium spectrum is significantly softer than the proton spectrum. This results in protons overtaking helium nuclei and becoming the largest cosmic ray component at E similar or equal to 0.7 PeV. A second crossing of the two spectra is observed at E similar or equal to 5 PeV, above the proton knee, when helium nuclei overtake protons to become the largest cosmic ray component again. These results have important implications for our understanding of the Galactic cosmic ray sources.
学科主题天文学 ; 星系与宇宙学
URL标识查看原文
出版地ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
WOS关键词ENERGY-SPECTRUM ; KNEE
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]; NSFC[12275280]; NSFC[12105293]; NSFC[11905240]; NSFC[12375106]; NSFC[12261141691]; Innovation Project of IHEP[E25451U2]; Sichuan Science and Technology Department[2024JDHJ0001]; Youth Innovation Promotion Association of the Chinese Academy of Sciences (CAS YIPA)[2023019]; Institute of High Energy Physics[E45464U2]; Thailand's National Science and Technology Development Agency (NSTDA); National Research Council of Thailand (NRCT) under the High-Potential Research Team Grant Program[N42A650868]
WOS研究方向Physics
语种英语
WOS记录号WOS:001746914500001
出版者AMER PHYSICAL SOC
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] ; NSFC[12275280, 12105293, 11905240, 12375106, 12261141691] ; Innovation Project of IHEP[E25451U2] ; Sichuan Science and Technology Department[2024JDHJ0001] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences (CAS YIPA)[2023019] ; Institute of High Energy Physics[E45464U2] ; Thailand's National Science and Technology Development Agency (NSTDA) ; National Research Council of Thailand (NRCT) under the High-Potential Research Team Grant Program[N42A650868]
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/29204]  
专题云南天文台_丽江天文观测站（南方基地）
通讯作者Chen, S.; Lv, H. K.; Wang, K.; Zhang, Li
作者单位1.National Space Science Center, Chinese Academy of Sciences, 100190 Beijing, China;
2.State Key Laboratory of Particle Astrophysics and Experimental Physics Division and Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China;
3.University of Chinese Academy of Sciences, 100049 Beijing, China;
4.TIANFU Cosmic Ray Research Center, 610000 Chengdu, Sichuan, China;
5.University of Science and Technology of China, 230026 Hefei, Anhui, China;
6.Yerevan State University, 1 Alek Manukyan Street, Yerevan 0025, Armenia;
7.Max-Planck-Institut for Nuclear Physics, P.O. Box 103980, 69029 Heidelberg, Germany;
8.Tsung-Dao Lee Institute and School of Physics and Astronomy, Shanghai Jiao Tong University, 200240 Shanghai, China;
9.Center for Astrophysics, Guangzhou University, 510006 Guangzhou, Guangdong, China;
10.APC, Université Paris Cité, CNRS/IN2P3, CEA/IRFU, Observatoire de Paris, 119 75205 Paris, France;
推荐引用方式
GB/T 7714		 Cao, Zhen,Aharonian, F.,Bai, Y. X.,et al. Precise Measurement of the Cosmic Ray Helium Spectrum above 0.1 PeV[J]. PHYSICAL REVIEW LETTERS,2026,136(12).
APA Cao, Zhen.,Aharonian, F..,Bai, Y. X..,Bao, Y. W..,Bastieri, D..,...&Zuo, X..(2026).Precise Measurement of the Cosmic Ray Helium Spectrum above 0.1 PeV.PHYSICAL REVIEW LETTERS,136(12).
MLA Cao, Zhen,et al."Precise Measurement of the Cosmic Ray Helium Spectrum above 0.1 PeV".PHYSICAL REVIEW LETTERS 136.12(2026).

入库方式： OAI收割

来源：云南天文台

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。