Detection of emission from Cygnus Cocoon above 100TeV with LHAASO | |
Li, Cong1,2; Chen, Songzhan1,2; Wu, Sha1,2; Wang, Lingyu1,2; Yang, Ruizhi3; Liu, Ruoyu4; Cao, Zhen1,2,5; Aharonian, F.6,7; An, Q.3,8; Axikegu9 | |
2022-03-18 | |
会议日期 | 2021-07-12 |
会议地点 | Virtual, Berlin, Germany |
卷号 | 395 |
DOI | 10.22323/1.395.0843 |
英文摘要 | The origin of PeV cosmic rays in the Galaxy is a long-standing puzzle. Superbubble or massive star cluster (MSC) has been suggested as powerful cosmic-ray accelerators. Cygnus Cocoon, an extended gamma-ray source, is likely associated with the MSC Cygnus OB2. Previous observations have shown that its spectrum extends up to 100 TeV with a break around 10 TeV. The spatial coincidence between the gamma-ray emission and molecular clouds in the region implies the hadronic origin of the gamma-ray emission, supporting Cygnus cocoon as a cosmic-ray proton accelerator. However, lack of a precise measurement of the spectrum beyond 100 TeV as well as relevant morphology prevent people from concluding that it is the source of PeV cosmic rays. We here report the observation of LHAASO-KM2A on this region. The maximum significance above 25 TeV is about 21.8σ. A photo with energy up to 1.4 PeV is detected from this region, which indicates the spectrum can extend up to 1 PeV. Such a result may be considered as the evidence for cosmic ray accelerated beyond PeV in Cygnus Cocoon. © Copyright owned by the author(s). |
产权排序 | 第29完成单位 |
会议录 | Proceedings of Science |
资助机构 | N/A |
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 |
资助项目 | N/A |
内容类型 | 会议论文 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/25737] |
专题 | 星系类星体研究组 |
作者单位 | 1.Key Laboratory of Particle Astrophyics, Experimental Physics Division, Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China; 2.TIANFU Cosmic Ray Research Center, Sichuan, Chengdu, China; 3.University of Science and Technology of China, Anhui, Hefei, 230026, China; 4.School of Astronomy and Space Science, Nanjing University, Jiangsu, Nanjing, 210023, China; 5.University of Chinese Academy of Sciences, Beijing, 100049, China; 6.Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, 2, Dublin, Ireland; 7.Max-Planck-Institut for Nuclear Physics, P.O. Box 103980, Heidelberg, 69029, Germany; 8.State Key Laboratory of Particle Detection and Electronics, China; 9.School of Physical Science and Technology, School of Information Science and Technology, Southwest Jiaotong University, Sichuan, Chengdu, 610031, China; 10.College of Physics, Sichuan University, Sichuan, Chengdu, 610065, China; |
推荐引用方式 GB/T 7714 | Li, Cong,Chen, Songzhan,Wu, Sha,et al. Detection of emission from Cygnus Cocoon above 100TeV with LHAASO[C]. 见:. Virtual, Berlin, Germany. 2021-07-12. |
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