Supermassive Black Hole and Broad-line Region in NGC 5548: 2023 Reverberation Mapping Results
文献类型：期刊论文
| 作者 | Xi WZ(席文哲)1,3; Lu KX(卢开兴)1,2,3; Bai JM(白金明)1,2,3; Yue Z(岳章)1,3; Yi WM(易卫敏)1,2; Xu L(许良)1,2; Li SS(李莎莎)1,2; Feng HC(封海成)1,2; Wang JG(王建国)1,2 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2025-12-20 |
| 卷号 | 995期号:2 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ae1ccb |
| 产权排序 | 第1完成单位 |
| 文献子类 | Article |
| 英文摘要 | We present the results of the 2023 spectroscopic reverberation mapping campaign for active galactic nuclei (AGNs) of NGC 5548, continuing our long-term monitoring program. Using the Lijiang 2.4 m telescope, we obtained 74 spectra with a median cadence of 1.9 days. Through detailed spectral decomposition, we measured the light curves of the optical continuum at 5100 & Aring; and the broad He ii, He i, H gamma, and H beta emission lines. The time lags of these lines relative to the continuum are measured as 1.3-0.6+1.6 , 2.3-2.1+1.5 , 10.0-1.8+2.0 , and 15.6-2.9+2.6 days (rest frame), respectively. Velocity-resolved lag profiles for H gamma and H beta were constructed. Combined with data from previous seasons (2015-2021), we found the following: the radial ionization stratification of the broad-line region (BLR) is stable; the average virial mass of the supermassive black hole in NGC 5548 is (2.6 +/- 1.1) x 108M circle dot, consistent with the MBH-sigma* relation; broad He ii line exhibits the largest responsivity, followed by broad He i (or H gamma) and H beta lines; and the BLR kinematics show significant temporal evolution, transitioning from virialized motions to signatures of inflow and outflow. Furthermore, an analysis of 35 yr of historical data confirms a 3.5 yr time lag between variations in the optical luminosity and the BLR radius, potentially implicating the role of radiation pressure or dynamical structure changes in the inner accretion disk. Long-term campaign demonstrates that the BLR in NGC 5548 is a robust yet dynamically evolving entity, providing crucial insights into AGN structure and accretion physics. |
| 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 | No.2 The Distillery, Glassfields, Avon Street, Bristol, ENGLAND |
| WOS关键词 | ACTIVE GALACTIC NUCLEI ; AGN MONITORING PROJECT ; HIGH ACCRETION RATES ; FE II REVERBERATION ; SPACE TELESCOPE ; EMISSION-LINES ; SEYFERT-GALAXIES ; SPECTROSCOPIC CAMPAIGN ; SPECTRAL VARIABILITY ; ANOMALOUS BEHAVIOR |
| 资助项目 | National Key R&D Program of China[2021YFA1600404]; National Natural Science Foundation of China[NSFC-12573020]; National Natural Science Foundation of China[12073068]; Youth Innovation Promotion Association of Chinese Academy of Sciences[2022058]; Young Talent Project of Yunnan Province; Yunnan Province Foundation[202401AT070138]; China Manned Space Project[CMS-CSST-2025-A07]; Chinese Academy of Sciences; People's Government of Yunnan Province |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001637536700001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | National Key R&D Program of China[2021YFA1600404] ; National Natural Science Foundation of China[NSFC-12573020, 12073068] ; Youth Innovation Promotion Association of Chinese Academy of Sciences[2022058] ; Young Talent Project of Yunnan Province ; Yunnan Province Foundation[202401AT070138] ; China Manned Space Project[CMS-CSST-2025-A07] ; Chinese Academy of Sciences ; People's Government of Yunnan Province |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28801]  |
| 专题 | 云南天文台_丽江天文观测站（南方基地） |
| 通讯作者 | Lu KX(卢开兴) |
| 作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, People’s Republic of China; lukx@ynao.ac.cn, baijinming@ynao.ac.cn; 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, People’s Republic of China 3.University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China; |
| 推荐引用方式 GB/T 7714 | Xi WZ,Lu KX,Bai JM,et al. Supermassive Black Hole and Broad-line Region in NGC 5548: 2023 Reverberation Mapping Results[J]. ASTROPHYSICAL JOURNAL,2025,995(2). |
| APA | 席文哲.,卢开兴.,白金明.,岳章.,易卫敏.,...&王建国.(2025).Supermassive Black Hole and Broad-line Region in NGC 5548: 2023 Reverberation Mapping Results.ASTROPHYSICAL JOURNAL,995(2). |
| MLA | 席文哲,et al."Supermassive Black Hole and Broad-line Region in NGC 5548: 2023 Reverberation Mapping Results".ASTROPHYSICAL JOURNAL 995.2(2025). |
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来源：云南天文台
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