Institutional Repository System Of Yunnan Observatories, CAS
| An Enigmatic PeVatron in an Area around H ii Region G35.6−0.5 | |
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| 发表期刊 | The Astrophysical Journal
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| 2025-01-17 | |
| 卷号 | 979期号:1 |
| DOI | 10.3847/1538-4357/ad991d |
| 产权排序 | 第27完成单位 |
| 收录类别 | SCI |
| 摘要 | Identifying Galactic PeVatrons (PeV particle accelerators) from ultrahigh-energy (UHE, >100 TeV) γ-ray sources plays a crucial role in revealing the origin of Galactic cosmic rays. The UHE source 1LHAASO J1857+0203u is suggested to be associated with HESS J1858+020, which may be attributed to the possible PeVatron candidate supernova remnant (SNR) G35.6?0.4 or H ii region G35.6?0.5. We perform detailed analysis on the very-high-energy and UHE γ-ray emissions toward this region with data from the Large High Altitude Air Shower Observatory (LHAASO). 1LHAASO J1857+0203u is detected with a significance of 11.6σ above 100 TeV, indicating the presence of a PeVatron. It has an extent of ～0 . ° 18 with a power-law (PL) spectral index of ～2.5 at 1–25 TeV and pointlike emission with a PL spectral index of ～3.2 above 25 TeV. Using archival CO and H i data, we identify some molecular and atomic clouds that may be associated with the TeV γ-ray emissions. Our modeling indicates that the TeV γ-ray emissions are unlikely to arise from clouds illuminated by the protons that escaped from SNR G35.6?0.4. In the scenario in which H ii region G35.6?0.5 could accelerate particles to the UHE band, the observed GeV–TeV γ-ray emission could be well explained by a hadronic model with a PL spectral index of ～2.0 and cutoff energy of ～450 TeV. However, an origin in an evolved pulsar wind nebula cannot be ruled out. |
| 语种 | 英语 |
| 学科领域 | 天体物理学 ; 高能天体物理学 ; 星系与宇宙学 |
| 文章类型 | Article |
| 出版者 | IOP Publishing Ltd |
| 出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
| ISSN | 0004-637X |
| URL | 查看原文 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/28123 |
| 专题 | 星系类星体研究组 高能天体物理研究组 |
| 通讯作者 | Chen,Y.; Zhang,X.; Zhong,W. J. |
| 作者单位 | 1.Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, People’s Republic of China 2.University of Chinese Academy of Sciences, 100049 Beijing, People’s Republic of China 3.TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, People’s Republic of China 4.Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, 2 Dublin, Ireland 5.Max-Planck-Institut for Nuclear Physics, P.O. Box 103980, 69029 Heidelberg, Germany 6.School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, 610031 Chengdu, Sichuan, People’s Republic of China 7.School of Astronomy and Space Science, Nanjing University, 210023 Nanjing, Jiangsu, People’s Republic of China; [email protected], [email protected] 8.Center for Astrophysics, Guangzhou University, 510006 Guangzhou, Guangdong, People’s Republic of China 9.Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University, 200240 Shanghai, People’s Republic of China 10.Institute for Nuclear Research of Russian Academy of Sciences, 117312 Moscow, Russia 11.Hebei Normal University, 050024 Shijiazhuang, Hebei, People’s Republic of China 12.University of Science and Technology of China, 230026 Hefei, Anhui, People’s Republic of China 13.State Key Laboratory of Particle Detection and Electronics, People’s Republic of China 14.Key Laboratory of Dark Matter and Space Astronomy & Key Laboratory of Radio Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, 210023 Nanjing, Jiangsu, People’s Republic of China 15.South-Western Institute for Astronomy Research, Yunnan University, 650091 Kunming, Yunnan, People’s Republic of China 16.Research Center for Astronomical Computing, Zhejiang Laboratory, 311121 Hangzhou, Zhejiang, People’s Republic of China 17.Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, 200030 Shanghai, People’s Republic of China 18.School of Physics and Astronomy, Yunnan University, 650091 Kunming, Yunnan, People’s Republic of China 19.Key Laboratory of Cosmic Rays (Tibet University), Ministry of Education, 850000 Lhasa, Tibet, People’s Republic of China 20.Department of Physics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s Republic of China 21.Key Laboratory of Radio Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, 100101 Beijing, People’s Republic of China 22.School of Physics and Astronomy (Zhuhai) & School of Physics (Guangzhou) & Sino-French Institute of Nuclear Engineering and Technology (Zhuhai), Sun Yat-sen University, 519000 Zhuhai & 510275 Guangzhou, Guangdong, People’s Republic of China 23.Institute of Frontier and Interdisciplinary Science, Shandong University, 266237 Qingdao, Shandong, People’s Republic of China 24.APC, Université Paris Cité, CNRS/IN2P3, CEA/IRFU, Observatoire de Paris, 119 75205 Paris, France 25.Department of Engineering Physics & Department of Astronomy, Tsinghua University, 100084 Beijing, People’s Republic of China 26.School of Physics and Microelectronics, Zhengzhou University, 450001 Zhengzhou, Henan, People’s Republic of China 27.Yunnan Observatories, Chinese Academy of Sciences, 650216 Kunming, Yunnan, People’s Republic of China 28.China Center of Advanced Science and Technology, Beijing 100190, People’s Republic of China 29.College of Physics, Sichuan University, 610065 Chengdu, Sichuan, People’s Republic of China 30.School of Physics, Peking University, 100871 Beijing, People’s Republic of China 31.Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, 530004 Nanning, Guangxi, People’s Republic of China 32.Department of Physics, Faculty of Science, Mahidol University, Bangkok 10400, Thailand 33.Moscow Institute of Physics and Technology, 141700 Moscow, Russia 34.Center for Relativistic Astrophysics and High Energy Physics, School of Physics and Materials Science & Institute of Space Science and Technology, Nanchang University, 330031 Nanchang, Jiangxi, People’s Republic of China 35.National Space Science Center, Chinese Academy of Sciences, 100190 Beijing, People’s Republic of China 36.School of Physics, Huazhong University of Science and Technology, Wuhan 430074, Hubei, People’s Republic of China 37.School of Physics and Technology, Nanjing Normal University, 210023 Nanjing, Jiangsu, People’s Republic of China; [email protected] |
| 推荐引用方式 GB/T 7714 | Cao,Zhen,Aharonian,F.,Axikegu,,et al. An Enigmatic PeVatron in an Area around H ii Region G35.6−0.5[J]. The Astrophysical Journal,2025,979(1). |
| APA | Cao,Zhen.,Aharonian,F..,Axikegu,.,Bai,Y. X..,Bao,Y. W..,...&,.(2025).An Enigmatic PeVatron in an Area around H ii Region G35.6−0.5.The Astrophysical Journal,979(1). |
| MLA | Cao,Zhen,et al."An Enigmatic PeVatron in an Area around H ii Region G35.6−0.5".The Astrophysical Journal 979.1(2025). |
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| An Enigmatic PeVatro（2130KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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