Discovery of a New Gamma-Ray Source, LHAASO J0341+5258, with Emission up to 200 TeV

doi:10.3847/2041-8213/ac0fd5

	Discovery of a New Gamma-Ray Source, LHAASO J0341+5258, with Emission up to 200 TeV
	Cao, Zhen 31,32,33; Aharonian, F.29,30; An, Q.27,28; Axikegu 26; Bai, L. X.25; Bai, Y. X.31,33; Bao, Y. W.24; Bastieri, D.23; Bi, X. J.31,32,33; Bi, Y. J.31,33
刊名	ASTROPHYSICAL JOURNAL LETTERS
	2021-08
卷号	917 期号:1
ISSN号	2041-8205
DOI	10.3847/2041-8213/ac0fd5
产权排序	第29完成单位
文献子类	Article
英文摘要	We report the discovery of a new unidentified extended gamma-ray source in the Galactic plane named LHAASO J0341+5258 with a pretrial significance of 8.2 standard deviations above 25 TeV. The best-fit position is R.A. = 55.degrees 34 +/- 0.degrees 11 and decl. = 52.degrees 97 +/- 0.degrees 07. The angular size of LHAASO J0341+5258 is 0.degrees 29 +/- 0.degrees 06(stat) +/- 0.degrees 02(sys). The flux above 25 TeV is about 20% of the flux of the Crab Nebula. Although a power-law fit of the spectrum from 10 to 200 TeV with the photon index alpha = 2.98 +/- 0.19(stat) +/- 0.02(sys) is not excluded, the LHAASO data together with the flux upper limit at 10 GeV set by the Fermi-LAT observation, indicate a noticeable steepening of an initially hard power-law spectrum with a cutoff at approximate to 50 TeV. We briefly discuss the origin of ultra-high-energy gamma rays. The lack of an energetic pulsar and a young supernova remnant inside or in the vicinity of LHAASO J0341+5258 challenge, but do not exclude, both the leptonic and hadronic scenarios of gamma-ray production.
学科主题	天文学
URL标识	查看原文
出版地	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
WOS关键词	PULSARS
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000684010500001
资助机构	National Key R&D Program of China[2017YFA0402701] ; CAS Key Research Program of Frontier Sciences[QYZDJ-SSW-SLH047]
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ynao.ac.cn/handle/114a53/24519]
专题	云南天文台_高能天体物理研究组
作者单位	1.National Space Science Center, Chinese Academy of Sciences, 100190 Beijing, People's Republic of China 2.Key Laboratory of Radio Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, 210023 Nanjing, Jiangsu, People's Republic of China; 3.Moscow Institute of Physics and Technology, 141700 Moscow, Russia; 4.Department of Physics, Faculty of Science, Mahidol University, 10400 Bangkok, Thailand; 5.Yunnan Observatories, Chinese Academy of Sciences, 650216 Kunming, Yunnan, People's Republic of China; 6.Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University, 200240 Shanghai, People's Republic of China; 7.School of Physical Science and Technology, Guangxi University, 530004 Nanning, Guangxi, People's Republic of China; 8.School of Physics, Peking University, 100871 Beijing, People's Republic of China; 9.Institute for Nuclear Research of Russian Academy of Sciences, 117312 Moscow, Russia; 10.School of Physics and Microelectronics, Zhengzhou University, 450001 Zhengzhou, Henan, People's Republic of China;
推荐引用方式 GB/T 7714	Cao, Zhen,Aharonian, F.,An, Q.,et al. Discovery of a New Gamma-Ray Source, LHAASO J0341+5258, with Emission up to 200 TeV[J]. ASTROPHYSICAL JOURNAL LETTERS,2021,917(1).
APA	Cao, Zhen.,Aharonian, F..,An, Q..,Axikegu.,Bai, L. X..,...&Zuo, X..(2021).Discovery of a New Gamma-Ray Source, LHAASO J0341+5258, with Emission up to 200 TeV.ASTROPHYSICAL JOURNAL LETTERS,917(1).
MLA	Cao, Zhen,et al."Discovery of a New Gamma-Ray Source, LHAASO J0341+5258, with Emission up to 200 TeV".ASTROPHYSICAL JOURNAL LETTERS 917.1(2021).