Observation of large-scale anisotropy in the arrival directions of cosmic rays with LHAASO-KM2A
文献类型：会议论文
| 作者 | Gao, Wei1; Cao, Qing2; Chen, Songzhan3; Cui, Shuwang2; He, Huihai3; Li, Wenlong1; Wu, Sha3; Zhang, Hengying1; Zhu, Chengguang1; Cao, Zhen4,5,6 |
| 出版日期 | 2022-03-18 |
| 会议日期 | 2021-07-12 |
| 会议地点 | Virtual, Berlin, Germany |
| 卷号 | 395 |
| DOI | 10.22323/1.395.0351 |
| 英文摘要 | A global large-scale anisotropy in the arrival directions of cosmic rays were observed both in the Northern and Southern Hemisphere. It is evident that the morphology of the large-scale anisotropy and magnitude is energy dependent. However, only a few experiments can up to PeV with long term data accumulation. The measurement of anisotropy at high energies can provide more clues to the origin and propagation of cosmic rays. The Large High Altitude Air Shower Observatory (LHAASO), covering an area of 1.36 square kilometer, detect cosmic rays from sub-TeV up to 100 PeV with good element discrimination ability. In this paper, data collected by half array of KM2A during 2020 is used to analyze the anisotropy. The anisoptropies from 23 TeV up to 985 TeV are reported. The "inverse" anisotropy is observed at 985 TeV with significance of 5σ. The evolution of the anisotropy with energy is consistent with the others. With the operation of LHAASO, more accurate observation for the cosmic-ray anisotropy at higher energy will be made. © Copyright owned by the author(s). |
| 产权排序 | 第32完成单位 |
| 资助机构 | National Natural Science Foundation of China[U1831129,U1931108] |
| 会议录 | Proceedings of Science
 |
| 会议录出版者 | Sissa Medialab Srl |
| 文献子类 | Conference article (CA) |
| 学科主题 | 天文学 ; 天体物理学 ; 高能天体物理学 ; 核科学技术 |
| 语种 | 英语 |
| URL标识 | 查看原文 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/25723]  |
| 专题 | 星系类星体研究组 |
| 作者单位 | 1.Shandong University, Institute of Frontier and Interdisciplinary Science, 72 Binhai Road, Qingdao, 266237, China; 2.Hebei Normal University, College of Physics, 20 East. 2nd Ring South Road, Shijiazhuang, 050024, China; 3.Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Beijing, 100049, China; 4.Key Laboratory of Particle Astrophyics, Experimental Physics Division, Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China; 5.University of Chinese Academy of Sciences, Beijing, 100049, China; 6.TIANFU Cosmic Ray Research Center, Sichuan, Chengdu, China; 7.Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, 2, Dublin, Ireland; 8.Max-Planck-Institut for Nuclear Physics, P.O. Box 103980, Heidelberg, 69029, Germany; 9.State Key Laboratory of Particle Detection and Electronics, China; 10.University of Science and Technology of China, Anhui, Hefei, 230026, China; |
| 推荐引用方式 GB/T 7714 | Gao, Wei,Cao, Qing,Chen, Songzhan,et al. Observation of large-scale anisotropy in the arrival directions of cosmic rays with LHAASO-KM2A[C]. 见:. Virtual, Berlin, Germany. 2021-07-12. |
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来源：云南天文台
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