Fermi detection of gamma-ray emission from the hot coronae of radio-quiet active galactic nuclei
文献类型：期刊论文
| 作者 | Liu, Jun-Rong1,2; Wang, Jian-Min1,2,3; Collaboration, Fermi-LAT |
| 刊名 | NATURE ASTRONOMY
 |
| 出版日期 | 2025 |
| ISSN号 | 2397-3366 |
| DOI | 10.1038/s41550-025-02538-2 |
| 文献子类 | Article; Early Access |
| 英文摘要 | Relativistic jets around supermassive black holes are well-known powerful gamma-ray emitters. In the absence of the jets in radio-quiet active galactic nuclei, how the supermassive black holes work in gamma-ray bands is still unknown despite great observational efforts in the past three decades. Here, considering the previous efforts, we carefully select an active galactic nucleus sample composed of 37 nearby Seyfert galaxies with ultrahard X-rays for gamma-ray detection by excluding all potential contamination in this band. Adopting a stacking technique, we report the significant gamma-ray detection (test statistic 30.6, or 5.2 sigma) from the sample using 15-year Fermi-LAT observations. We find the average gamma-ray luminosity of the sample to be (1.5 +/- 1.0) x 10(40) erg s(-1) at energies of 1-300 GeV. Limited by the well-known pair production from the interaction of gamma-rays with low-energy photons, gamma-rays of more than several giga-electronvolts are found to originate from an extended corona (similar to 2.7 x 10(6) gravitational radii), whereas the canonical much more compact X-ray corona (similar to 10 gravitational radii) is responsible for gamma-rays of one to several giga-electronvolts. The finding of the compact region lends strong support to the long-time theoretical expectations, but the extended corona is an unexpected finding. One promising scenario is that the electron-positron pairs produced in the compact X-ray corona would expand as a fireball, similar to that in gamma-ray bursts, forming the structure of extended corona. |
| 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 | HEIDELBERGER PLATZ 3, BERLIN, 14197, GERMANY |
| WOS关键词 | X-RAY ; BLACK-HOLE ; SKY SURVEY ; ACCRETION DISCS ; NGC 4151 ; IRON K ; GALAXY ; SPECTRA ; COMPTONIZATION ; ACCELERATION |
| 资助项目 | National Science Foundation of China | National Natural Science Foundation of China-Yunnan Joint Fund (NSFC-Yunnan Joint Fund)[12333003]; National Science Foundation of China | National Natural Science Foundation of China-Yunnan Joint Fund (NSFC-Yunnan Joint Fund)[12273038]; National Science Foundation of China | National Natural Science Foundation of China-Yunnan Joint Fund (NSFC-Yunnan Joint Fund)[11991050]; National Science Foundation of China | National Natural Science Foundation of China-Yunnan Joint Fund (NSFC-Yunnan Joint Fund)[11991054]; NSFC[2020YFC2201400]; NSFC[2021YFA1600404]; National Key R&D Program of China; LAT development; DOE (United States); ASI; INFN (Italy), MEXT; K.A. Wallenberg Foundation; Swedish Research Council; National Space Board (Sweden); INAF (Italy); CNES (France)[DE-AC02-76SF00515]; DOE |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001512737800001 |
| 出版者 | NATURE PORTFOLIO |
| 资助机构 | National Science Foundation of China | National Natural Science Foundation of China-Yunnan Joint Fund (NSFC-Yunnan Joint Fund)[12333003, 12273038, 11991050, 11991054] ; NSFC[2020YFC2201400, 2021YFA1600404] ; National Key R&D Program of China ; LAT development ; DOE (United States) ; ASI ; INFN (Italy), MEXT ; K.A. Wallenberg Foundation ; Swedish Research Council ; National Space Board (Sweden) ; INAF (Italy) ; CNES (France)[DE-AC02-76SF00515] ; DOE |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28377]  |
| 专题 | 星系类星体研究组 |
| 通讯作者 | Wang, Jian-Min |
| 作者单位 | 1.Key Laboratory for Particle Astrophysics, Institute of High Energy Physics, Beijing, China; 2.School of Astronomy and Space Sciences, University of Chinese Academy of Sciences, Beijing, China; 3.National Astronomical Observatory of China, Beijing, China |
| 推荐引用方式 GB/T 7714 | Liu, Jun-Rong,Wang, Jian-Min,Collaboration, Fermi-LAT. Fermi detection of gamma-ray emission from the hot coronae of radio-quiet active galactic nuclei[J]. NATURE ASTRONOMY,2025. |
| APA | Liu, Jun-Rong,Wang, Jian-Min,&Collaboration, Fermi-LAT.(2025).Fermi detection of gamma-ray emission from the hot coronae of radio-quiet active galactic nuclei.NATURE ASTRONOMY. |
| MLA | Liu, Jun-Rong,et al."Fermi detection of gamma-ray emission from the hot coronae of radio-quiet active galactic nuclei".NATURE ASTRONOMY (2025). |
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