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Discovery of the Ultrahigh-energy Gamma-Ray Source LHAASO J2108+5157
Cao, Zhen1,2,3; Aharonian, F.4,5; An, Q.6,7; Axikegu8; Bai, L. X.9; Bai, Y. X.1,3; Bao, Y. W.10; Bastieri, D.11; Bi, X. J.1,2,3; Bi, Y. J.1,3; Cai, H.12; Cai, J. T.11; Cao, Zhe6,7; Chang, J.13; Chang, J. F.1,3,6; Chen, B. M.14; Chen, E. S.1,2,3; Chen, J.9; Chen, Liang1,2,3,15; Chen, Long8; Chen, M. J.1,3; Chen, M. L.1,3,6; Chen, Q. H.8; Chen, S. H.1,2,3; Chen, S. Z.1,3; Chen, T. L.16; Chen, X. L.1,2,3; Chen, Y.10; Cheng, N.1,3; Cheng, Y. D.1,3; Cui, S. W.14; Cui, X. H.17; Cui, Y. D.18; Piazzoli, B. D'Ettorre19; Dai, B. Z.20; Dai, H. L.1,3,6; Dai, Z. G.7; Dan-Zeng-Luo-Bu, Dan-Zeng16; Volpe, D. della21; Dong, X. J.1,3; Duan, K. K.13; Fan, J. H.11; Fan, Y. Z.13; Fan, Z. X.1,3; Fang, J.20; Fang, K.1,3; Feng, C. F.22; Feng, L.13; Feng, S. H.1,3; Feng, Y. L.13; Gao, B.1,3; Gao, C. D.22; Gao, L. Q.1,2,3; Gao, Q.16; Gao, W.22; Ge, M. M.20; Geng, L. S.1,3; Gong, G. H.23; Gou, Q. B.1,3; Gu, M. H.1,3,6; Guo, F. L.15; Guo, J. G.1,2,3; Guo, X. L.8; Guo, Y. Q.1,3; Guo, Y. Y.1,2,3,13; Han, Y. A.24; He, H. H.1,2,3; He, H. N.13; He, J. C.1,2,3; He, S. L.11; He, X. B.18; He, Y.8; Heller, M.21; Hor, Y. K.18; Hou, C.1,3; Hu, H. B.1,2,3; Hu, S.9; Hu, S. C.1,2,3; Hu, X. J.23; Huang, D. H.8; Huang, Q. L.1,3; Huang, W. H.22; Huang, X. T.22; Huang, X. Y.13; Huang, Z. C.8; Ji, F.1,3; Ji, X. L.1,3,6; Jia, H. Y.8; Jiang, K.6,7; Jiang, Z. J.20; Jin, C.1,2,3; Ke, T.1,3; Kuleshov, D.25; Levochkin, K.25; Li, B. B.14; Li, Cheng6,7; Li, Cong1,3; Li, F.1,3,6; Li, H. B.1,3; Li, H. C.1,3; Li, H. Y.7,13; Li, J.1,3,6; Li, K.1,3; Li, W. L.22; Li, X. R.1,3; Li, Xin6,7; Li, Xin8; Li, Y.9; Li, Y. Z.1,2,3; Li, Zhe1,3; Li, Zhuo26; Liang, E. W.27; Liang, Y. F.27; Lin, S. J.18; Liu, B.7; Liu, C.1,3; Liu, D.22; Liu, H.8; Liu, H. D.24; Liu, J.1,3; Liu, J. L.28; Liu, J. S.18; Liu, J. Y.1,3; Liu, M. Y.16; Liu, R. Y.10; Liu, S. M.8; Liu, W.1,3; Liu, Y.11; Liu, Y. N.23; Liu, Z. X.9; Long, W. J.8; Lu, R.20; Lv, H. K.1,3; Ma, B. Q.26; Ma, L. L.1,3; Ma, X. H.1,3; Mao JR(毛基荣)29; Masood, A.8; Min, Z.1,3; Mitthumsiri, W.30; Montaruli, T.21; Nan, Y. C.22; Pang, B. Y.8; Pattarakijwanich, P.30; Pei, Z. Y.11; Qi, M. Y.1,3; Qi, Y. Q.14; Qiao, B. Q.1,3; Qin, J. J.7; Ruffolo, D.30; Rulev, V.25; Sáiz, A.30; Shao, L.14; Shchegolev, O.25,31; Sheng, X. D.1,3; Shi, J. Y.1,3; Song, H. C.26; Stenkin, Yu. V.25,31; Stepanov, V.25; Su, Y.13; Sun, Q. N.8; Sun, X. N.27; Sun, Z. B.32; Tam, P. H. T.18; Tang, Z. B.6,7; Tian, W. W.2,17; Wang, B. D.1,3; Wang, C.32; Wang, H.8; Wang, H. G.11; Wang JC(王建成)29; Wang, J. S.28; Wang, L. P.22; Wang, L. Y.1,3; Wang, R. N.8; Wang, W.18; Wang, W.12; Wang, X. G.27; Wang, X. J.1,3; Wang, X. Y.10; Wang, Y.8; Wang, Y. D.1,3; Wang, Y. J.1,3; Wang, Y. P.1,2,3; Wang, Z. H.9; Wang, Z. X.20; Wang, Zhen28; Wang, Zheng1,3,6; Wei, D. M.13; Wei, J. J.13; Wei, Y. J.1,2,3; Wen, T.20; Wu, C. Y.1,3; Wu, H. R.1,3; Wu, S.1,3; Wu, W. X.8; Wu, X. F.13; Xi, S. Q.1,3; Xia, J.7,13; Xia, J. J.8; Xiang, G. M.2,15; Xiao, D. X.16; Xiao, G.1,3; Xiao, H. B.11; Xin, G. G.12; Xin, Y. L.8; Xing, Y.15; Xu, D. L.28; Xu, R. X.26; Xue, L.22; Yan DH(闫大海)29; Yan, J. Z.13; Yang, C. W.9; Yang, F. F.1,3,6; Yang, J. Y.18; Yang, L. L.18; Yang, M. J.1,3; Yang, R. Z.7; Yang, S. B.20; Yao, Y. H.9; Yao, Z. G.1,3; Ye, Y. M.23; Yin, L. Q.1,3; Yin, N.22; You, X. H.1,3; You, Z. Y.1,2,3; Yu, Y. H.22; Yuan, Q.13; Zeng, H. D.13; Zeng, T. X.1,3,6; Zeng, W.20; Zeng, Z. K.1,2,3; Zha, M.1,3; Zhai, X. X.1,3; Zhang, B. B.10; Zhang, H. M.10; Zhang, H. Y.22; Zhang, J. L.17; Zhang, J. W.9; Zhang, L. X.11; Zhang, Li20; Zhang, Lu14; Zhang, P. F.20; Zhang, P. P.14; Zhang, R.7,13; Zhang, S. R.14; Zhang, S. S.1,3; Zhang, X.10; Zhang, X. P.1,3; Zhang, Y. F.8; Zhang, Y. L.1,3; Zhang, Yi1,13; Zhang, Yong1,3; Zhao, B.8; Zhao, J.1,3; Zhao, L.6,7; Zhao, L. Z.14; Zhao, S. P.13,22; Zheng, F.32; Zheng, Y.8; Zhou, B.1,3; Zhou, H.28; Zhou, J. N.15; Zhou, P.10; Zhou, R.9; Zhou, X. X.8; Zhu, C. G.22; Zhu, F. R.8; Zhu, H.17; Zhu, K. J.1,2,3,6; Zuo, X.1,3
发表期刊ASTROPHYSICAL JOURNAL LETTERS
2021-10
卷号919期号:2
DOI10.3847/2041-8213/ac2579
产权排序第29完成单位
收录类别SCI
关键词Gamma-ray astronomy Gamma-ray sources Gamma-ray observatories
摘要

We report the discovery of an ultrahigh-energy (UHE) gamma-ray source, LHAASO J2108+5157, by analyzing the LHAASO-KM2A data of 308.33 live days. A significant excess of gamma ray-induced showers is observed in both energy bands of 25-100 and >100 TeV with 9.5 sigma and 8.5 sigma, respectively. This source is not significantly favored as an extended source with an angular extension smaller than the point-spread function of KM2A. The measured energy spectrum from 20 to 200 TeV can be approximately described by a power-law function with an index of -2.83 +/- 0.18(stat). A harder spectrum is demanded at lower energies considering the flux upper limit set by Fermi-LAT observations. The position of the gamma-ray emission is correlated with a giant molecular cloud, which favors a hadronic origin. No obvious counterparts have been found, and deeper multiwavelength observations will help to cast new light on this intriguing UHE source.

资助项目National Key R&D program of China[2018YFA0404201] ; National Key R&D program of China[2018YFA0404202] ; National Key R&D program of China[2018YFA0404203] ; National Key R&D program of China[2018YFA0404204] ; NSFCNational Natural Science Foundation of China (NSFC)[12022502] ; NSFCNational Natural Science Foundation of China (NSFC)[11905227] ; NSFCNational Natural Science Foundation of China (NSFC)[11635011] ; NSFCNational Natural Science Foundation of China (NSFC)[U1931112] ; NSFCNational Natural Science Foundation of China (NSFC)[11905043] ; NSFCNational Natural Science Foundation of China (NSFC)[U1931111] ; Thailand Science Research and Innovation[RTA6280002] ; Chengdu Management Committee of Tianfu New Area ; Natural Sciences and Engineering Research CouncilNatural Sciences and Engineering Research Council of Canada (NSERC)
项目资助者National Key R&D program of China[2018YFA0404201, 2018YFA0404202, 2018YFA0404203, 2018YFA0404204] ; NSFCNational Natural Science Foundation of China (NSFC)[12022502, 11905227, 11635011, U1931112, 11905043, U1931111] ; Thailand Science Research and Innovation[RTA6280002] ; Chengdu Management Committee of Tianfu New Area ; Natural Sciences and Engineering Research CouncilNatural Sciences and Engineering Research Council of Canada (NSERC)
语种英语
学科领域天文学 ; 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
ISSN2041-8205
URL查看原文
WOS记录号WOS:000702104200001
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]LARGE-AREA TELESCOPE ; MOLECULAR CLOUDS ; EMISSION
引用统计
被引频次：25[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
版本出版稿
条目标识符http://ir.ynao.ac.cn/handle/114a53/24577
专题星系类星体研究组
高能天体物理研究组
通讯作者Chen, S. H.
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; [email protected];
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; [email protected], [email protected], [email protected];
4.Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, 2 Dublin, Ireland;
5.Max-Planck-Institut for Nuclear Physics, P.O. Box 103980, D-69029 Heidelberg, Germany;
6.State Key Laboratory of Particle Detection and Electronics, People's Republic of China;
7.University of Science and Technology of China, 230026 Hefei, Anhui, People's Republic of China;
8.School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, 610031 Chengdu, Sichuan, People's Republic of China; [email protected];
9.College of Physics, Sichuan University, 610065 Chengdu, Sichuan, People's Republic of China;
10.School of Astronomy and Space Science, Nanjing University, 210023 Nanjing, Jiangsu, People's Republic of China;
11.Center for Astrophysics, Guangzhou University, 510006 Guangzhou, Guangdong, People's Republic of China;
12.School of Physics and Technology, Wuhan University, 430072 Wuhan, Hubei, People's Republic of China;
13.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, 210023 Nanjing, Jiangsu, People's Republic of China;
14.Hebei Normal University, 050024 Shijiazhuang, Hebei, People's Republic of China;
15.Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, 200030 Shanghai, People's Republic of China;
16.Key Laboratory of Cosmic Rays (Tibet University), Ministry of Education, 850000 Lhasa, Tibet, People's Republic of China;
17.National Astronomical Observatories, Chinese Academy of Sciences, 100101 Beijing, People's Republic of China;
18.School of Physics and Astronomy & School of Physics (Guangzhou), Sun Yat-sen University, 519000 Zhuhai, Guangdong, People's Republic of China;
19.Dipartimento di Fisica dell'Università di Napoli
20.School of Physics and Astronomy, Yunnan University, 650091 Kunming, Yunnan, People's Republic of China;
21.Département de Physique Nucléaire et Corpusculaire, Faculté de Sciences, Université de Genève, 24 Quai Ernest Ansermet, 1211 Geneva, Switzerland;
22.Institute of Frontier and Interdisciplinary Science, Shandong University, 266237 Qingdao, Shandong, People's Republic of China;
23.Department of Engineering Physics, Tsinghua University, 100084 Beijing, People's Republic of China;
24.School of Physics and Microelectronics, Zhengzhou University, 450001 Zhengzhou, Henan, People's Republic of China;
25.Institute for Nuclear Research of Russian Academy of Sciences, 117312 Moscow, Russia;
26.School of Physics, Peking University, 100871 Beijing, People's Republic of China;
27.School of Physical Science and Technology, Guangxi University, 530004 Nanning, Guangxi, People's Republic of China;
28.Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University, 200240 Shanghai, People's Republic of China;
29.Yunnan Observatories, Chinese Academy of Sciences, 650216 Kunming, Yunnan, People's Republic of China;
30.Department of Physics, Faculty of Science, Mahidol University, 10400 Bangkok, Thailand;
31.Moscow Institute of Physics and Technology, 141700 Moscow, Russia;
32.National Space Science Center, Chinese Academy of Sciences, 100190 Beijing, People's Republic of China
推荐引用方式
GB/T 7714		 Cao, Zhen,Aharonian, F.,An, Q.,et al. Discovery of the Ultrahigh-energy Gamma-Ray Source LHAASO J2108+5157[J]. ASTROPHYSICAL JOURNAL LETTERS,2021,919(2).
APA Cao, Zhen.,Aharonian, F..,An, Q..,Axikegu.,Bai, L. X..,...&Zuo, X..(2021).Discovery of the Ultrahigh-energy Gamma-Ray Source LHAASO J2108+5157.ASTROPHYSICAL JOURNAL LETTERS,919(2).
MLA Cao, Zhen,et al."Discovery of the Ultrahigh-energy Gamma-Ray Source LHAASO J2108+5157".ASTROPHYSICAL JOURNAL LETTERS 919.2(2021).
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