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Detection of two TeV gamma-ray outbursts from NGC 1275 by LHAASO

文献类型：期刊论文

作者Cao, Zhen1,2,3; Aharonian, F.4,5; Axikegu6; Bai, Y. X.1,3; Bao, Y. W.7; Bastieri, D.8; Bi, X. J.1,2,3; Bi, Y. J.1,3; Bian, W.9; Bukevich, A. V.10
刊名Monthly Notices of the Royal Astronomical Society
出版日期2025-06-01
卷号540期号:2页码:1860-1869
关键词methods: data analysis methods: statistical galaxies: active galaxies: jets gamma rays: general
ISSN号0035-8711
DOI10.1093/mnras/stae2512
产权排序第30完成单位
文献子类Journal article (JA)
英文摘要The Water Cherenkov Detector Array (WCDA) is one of the components of Large High Altitude Air Shower Observatory (LHAASO) and can monitor any sources over two-thirds of the sky for up to 7 h per day with >98 per cent duty cycle. In this work, we report the detection of two outbursts of the Fanaroff–Riley I radio galaxy NGC 1275 that were detected by LHAASO-WCDA between 2022 November and 2023 January with statistical significance of 5.2σ and 8.3σ. The observed spectral energy distribution in the range from 500 GeV to 3 TeV is fitted by a power law with the best-fitting spectral index of α = −3.37 ± 0.52 and −3.35 ± 0.29, respectively. The outburst flux above 0.5 TeV was (4.55 ± 4.21) × 10−11 cm−2 s−1 and (3.45 ± 1.78) × 10−11 cm−2 s−1, corresponding to 60 per cent and 45 per cent of Crab Nebula flux, respectively. Variation analysis reveals the variability time-scale of days at the TeV energy band. A simple test by one-zone synchrotron self-Compton model reproduces the data in the gamma-ray band well. © 2024 The Author(s).
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
资助项目National Natural Science Foundation of China[12173039];National Natural Science Foundation of China[12173066];National Natural Science Foundation of China[12175121];National Natural Science Foundation of China[12393813];National Natural Science Foundation of China[12393851];National Natural Science Foundation of China[12393852];National Natural Science Foundation of China[12393853];National Natural Science Foundation of China[12393854]
语种英语
资助机构National Natural Science Foundation of China[12173039, 12173066, 12175121, 12393813, 12393851, 12393852, 12393853, 12393854]
源URL[http://ir.ynao.ac.cn/handle/114a53/28374]  
专题星系类星体研究组
作者单位1.Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China;
2.University of Chinese Academy of Sciences, Beijing, 100049, China;
3.TIANFU Cosmic Ray Research Center, Sichuan, Chengdu, China;
4.Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, 2, Dublin, Ireland;
5.Max-Planck-Institut for Nuclear Physics, P.O. Box 103980, Heidelberg, D-69029, Germany;
6.School of Physical Science and Technology, School of Information Science and Technology, Southwest Jiaotong University, Sichuan, Chengdu, 610031, China;
7.School of Astronomy and Space Science, Nanjing University, Jiangsu, Nanjing, 210023, China;
8.Center for Astrophysics, Guangzhou University, Guangdong, Guangzhou, 510006, China;
9.Tsung-Dao Lee Institute, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, 200240, China;
10.Institute for Nuclear Research of Russian Academy of Sciences, Moscow, 117312, Russia;
推荐引用方式
GB/T 7714		 Cao, Zhen,Aharonian, F.,Axikegu,et al. Detection of two TeV gamma-ray outbursts from NGC 1275 by LHAASO[J]. Monthly Notices of the Royal Astronomical Society,2025,540(2):1860-1869.
APA Cao, Zhen.,Aharonian, F..,Axikegu.,Bai, Y. X..,Bao, Y. W..,...&Stepanov, V..(2025).Detection of two TeV gamma-ray outbursts from NGC 1275 by LHAASO.Monthly Notices of the Royal Astronomical Society,540(2),1860-1869.
MLA Cao, Zhen,et al."Detection of two TeV gamma-ray outbursts from NGC 1275 by LHAASO".Monthly Notices of the Royal Astronomical Society 540.2(2025):1860-1869.

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