Study of ultra-high-energy gamma-ray source 1LHAASO J0056+6346u and its possible origins
文献类型：期刊论文
| 作者 | Cao, Zhen2,3,4; Aharonian, F.5,6; Axikegu7; 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.10; Bukevich, A. V.11 |
| 刊名 | SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
 |
| 出版日期 | 2025-07 |
| 卷号 | 68期号:7 |
| 关键词 | gamma rays cosmic rays supernova remnant young massive cluster pulsar |
| ISSN号 | 1674-7348 |
| DOI | 10.1007/s11433-024-2661-8 |
| 产权排序 | 第27完成单位 |
| 文献子类 | Article |
| 英文摘要 | We report a dedicated study of the newly discovered extended UHE gamma-ray source 1LHAASO J0056+6346u. Analyzing 979 d of LHAASO-WCDA data and 1389 d of LHAASO-KM2A data, we observed a significant excess of gamma-ray events with both WCDA and KM2A. Assuming a point power-law source with a fixed spectral index, the significance maps reveal excesses of 12.65 sigma, 22.18 sigma, and 10.24 sigma in the energy ranges of 1-25, 25-100, and >100 TeV, respectively. We use a 3D likelihood algorithm to derive the morphological and spectral parameters, and the source is detected with significances of 13.72 sigma by WCDA and 25.27 sigma by KM2A. The best-fit positions derived from WCDA and KM2A data are (R.A. = 13.96 degrees +/- 0.09 degrees, Decl. = 63.92 degrees +/- 0.05 degrees) and (R.A. = 14.00 degrees +/- 0.05 degrees, Decl. = 63.79 degrees +/- 0.02 degrees), respectively. The angular size (r(39)) of 1LHAASO J0056+6346u is 0.34 degrees +/- 0.04 degrees at 1-25 TeV and 0.24 degrees +/- 0.02 degrees at >25 TeV. The differential flux of this UHE gamma-ray source can be described by an exponential cutoff power-law function: (2.67 +/- 0.25) x 10(-15) (E/20 TeV)((-1.97 +/- 0.10)) e(-E/(55.1 +/- 7.2) TeV) TeV-1 cm(-2) s(-1). To explore potential sources of gamma-ray emission, we investigated the gas distribution around 1LHAASO J0056+6346u. 1LHAASO J0056+6346u is likely to be a TeV PWN powered by an unknown pulsar, which would naturally explain both its spatial and spectral properties. Another explanation is that this UHE gamma-ray source might be associated with gas content illuminated by a nearby CR accelerator, possibly the SNR candidate G124.0+1.4. |
| 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 | 16 DONGHUANGCHENGGEN NORTH ST, BEIJING 100717, PEOPLES R CHINA |
| WOS关键词 | MILKY-WAY ; GALACTIC PLANE ; HESS OBSERVATIONS ; EMISSION ; CATALOG ; LONGITUDES ; DISCOVERY ; PROJECT ; GALAXY ; MODEL |
| 资助项目 | National Natural Science Foundation ofChina[12393854] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001499046000001 |
| 出版者 | SCIENCE PRESS |
| 资助机构 | National Natural Science Foundation ofChina[12393854] |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28323]  |
| 专题 | 星系类星体研究组 云南天文台_丽江天文观测站（南方基地） 云南天文台_高能天体物理研究组 |
| 作者单位 | 1.State Key Laboratory of Particle Detection and Electronics, Beijing, 100049, China; 2.Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China; 3.University of Chinese Academy of Sciences, Beijing, 100049, China; 4.TIANFU Cosmic Ray Research Center, Chengdu, 610213, China; 5.Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, Dublin, 2, Ireland; 6.Max-Planck-Institut for Nuclear Physics, Heidelberg, 69029, Germany; 7.School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, Chengdu, 610031, China; 8.School of Astronomy and Space Science, Nanjing University, Nanjing, 210023, China; 9.Center for Astrophysics, Guangzhou University, Guangzhou, 510006, China; 10.Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, 200240, China; |
| 推荐引用方式 GB/T 7714 | Cao, Zhen,Aharonian, F.,Axikegu,et al. Study of ultra-high-energy gamma-ray source 1LHAASO J0056+6346u and its possible origins[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2025,68(7). |
| APA | Cao, Zhen.,Aharonian, F..,Axikegu.,Bai, Y. X..,Bao, Y. W..,...&Zuo, X..(2025).Study of ultra-high-energy gamma-ray source 1LHAASO J0056+6346u and its possible origins.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,68(7). |
| MLA | Cao, Zhen,et al."Study of ultra-high-energy gamma-ray source 1LHAASO J0056+6346u and its possible origins".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 68.7(2025). |
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。