Discovery of Very High Energy Gamma-Ray Emissions from the Low-luminosity AGN NGC 4278 by LHAASO
文献类型：期刊论文
| 作者 | Cao,Zhen32,33,34; Aharonian,F.30,31; Axikegu,29; Bai,Y. X.32,34; Bao,Y. W.28; Bastieri,D.27; Bi,X. J.32,33,34; Bi,Y. J.32,34; Bian,W.26; Bukevich,A. V.25 |
| 刊名 | The Astrophysical Journal Letters
 |
| 出版日期 | 2024-08-01 |
| 卷号 | 971期号:2 |
| ISSN号 | 2041-8205 |
| DOI | 10.3847/2041-8213/ad5e6d |
| 英文摘要 | Abstract The first source catalog of the Large High Altitude Air Shower Observatory (LHAASO) reported the detection of a very high energy gamma-ray source, 1LHAASO J1219+2915. This Letter presents a further detailed study of the spectral and temporal behavior of this pointlike source. The best-fit position of the TeV source (R.A. = 185.°05 ± 0.°04, decl. = 29.°25 ± 0.°03) is compatible with NGC 4278 within ～0.°03. Variation analysis shows an indication of variability on a timescale of a few months in the TeV band, which is consistent with low-frequency observations. Based on these observations, we report the detection of TeV γ-ray emissions from this low-luminosity active galactic nucleus. The observation by LHAASO's Water Cherenkov Detector Array during the active period has a significance level of 8.8σ with a best-fit photon spectral index Γ = 2.56 ± 0.14 and a flux f 1–10 TeV = (7.0 ± 1.1sta ± 0.35syst) × 10?13 photons cm?2 s?1, or approximately 5% of the Crab Nebula. The discovery of VHE gamma-ray emission from NGC 4278 indicates that compact, weak radio jets can efficiently accelerate particles and emit TeV photons. |
| 语种 | 英语 |
| WOS记录号 | IOP:APJL_971_2_L45 |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/27607]  |
| 专题 | 星系类星体研究组 |
| 作者单位 | 1.School of Physics, Huazhong University of Science and Technology, Wuhan 430074, Hubei, People's Republic of China 2.National Space Science Center, Chinese Academy of Sciences, 100190 Beijing, People's Republic of China 3.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 4.Moscow Institute of Physics and Technology, 141700 Moscow, Russia 5.Department of Physics, Faculty of Science, Mahidol University, Bangkok 10400, Thailand 6.Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, 530004 Nanning, Guangxi, People's Republic of China 7.School of Physics, Peking University, 100871 Beijing, People's Republic of China 8.College of Physics, Sichuan University, 610065 Chengdu, Sichuan, People's Republic of China 9.China Center of Advanced Science and Technology, Beijing 100190, People's Republic of China 10.Yunnan Observatories, Chinese Academy of Sciences, 650216 Kunming, Yunnan, People's Republic of China |
| 推荐引用方式 GB/T 7714 | Cao,Zhen,Aharonian,F.,Axikegu,,et al. Discovery of Very High Energy Gamma-Ray Emissions from the Low-luminosity AGN NGC 4278 by LHAASO[J]. The Astrophysical Journal Letters,2024,971(2). |
| APA | Cao,Zhen.,Aharonian,F..,Axikegu,.,Bai,Y. X..,Bao,Y. W..,...&赵晓红.(2024).Discovery of Very High Energy Gamma-Ray Emissions from the Low-luminosity AGN NGC 4278 by LHAASO.The Astrophysical Journal Letters,971(2). |
| MLA | Cao,Zhen,et al."Discovery of Very High Energy Gamma-Ray Emissions from the Low-luminosity AGN NGC 4278 by LHAASO".The Astrophysical Journal Letters 971.2(2024). |
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