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Velocity-resolved Reverberation Mapping of Changing-look Active Galactic Nucleus NGC 4151 during Outburst Stage. II. Results of Four Seasons of Observation
Feng HC(封海成)1,2,3,4; Li SS(李莎莎)1,2,3,4; Bai JM(白金明)1,2,3,4; Liu HT(刘洪涛)1,2,3; Lu KX(卢开兴)1,2,3; Pang, Yu-Xuan5,6; Sun, Mouyuan7; Wang JG(王建国)1,2,3; Zhang, Yang-Wei8; Zhou, Shuying7
发表期刊ASTROPHYSICAL JOURNAL
2024-12-01
卷号976期号:2
DOI10.3847/1538-4357/ad8568
产权排序第1完成单位
收录类别SCI
摘要We present the results of a four-year velocity-resolved reverberation mapping (RM) campaign of the changing-look active galactic nucleus (CL-AGN) NGC 4151 during its outburst phase. By measuring the time lags of the H alpha, H beta, H gamma, He i, and He ii emission lines, we confirm a stratified broad-line region (BLR) structure that aligns with predictions from photoionization models. Intriguingly, we observed an anti-breathing phenomenon, where the lags of broad emission lines decreased with increasing luminosity, contrary to the typical expectation. This anomaly may be attributed to the influence of the ultraviolet-optical lag or nonvirialized motions in the BLR gas. Velocity-resolved RM and ionization mapping analyses revealed rapid and significant changes in the BLR geometry and kinematics on timescales of less than a year, which cannot be interpreted by any single mechanism, such as an inhomogeneous BLR, variations in radiation pressure, or changes in the illuminated ionizing field. Additionally, the H beta lags of NGC 4151 and other CL-AGNs agree with the radius-luminosity relationship established for AGNs with low accretion rates, implying that the CL phenomenon is more likely driven by intrinsic changes in the accretion rate rather than obscuration. These findings provide new insights into the complex internal processes of CL-AGNs and highlight the importance of long-term, multiline RM for understanding BLR structures, geometry, and kinematics.
资助项目MOST divided by National Key Research and Development Program of China (NKPs)https://doi.org/10.13039/501100012166[2021YFA1600404]; National Key R&D Program of China[12303022]; National Key R&D Program of China[12203096]; National Key R&D Program of China[12373018]; National Key R&D Program of China[11991051]; National Key R&D Program of China[12322303]; National Key R&D Program of China[12203041]; National Key R&D Program of China[12073068]; National Natural Science Foundation of China[202301AT070358]; National Natural Science Foundation of China[202301AT070339]; Yunnan Fundamental Research Projects; Yunnan Postdoctoral Research Foundation; Special Research Assistant Funding Project of Chinese Academy of Sciences[2022J06002]; Natural Science Foundation of Fujian Province of China[CMS-CSST-2021-A06]; China Manned Space Project
项目资助者MOST divided by National Key Research and Development Program of China (NKPs)https://doi.org/10.13039/501100012166[2021YFA1600404] ; National Key R&D Program of China[12303022, 12203096, 12373018, 11991051, 12322303, 12203041, 12073068] ; National Natural Science Foundation of China[202301AT070358, 202301AT070339] ; Yunnan Fundamental Research Projects ; Yunnan Postdoctoral Research Foundation ; Special Research Assistant Funding Project of Chinese Academy of Sciences[2022J06002] ; Natural Science Foundation of Fujian Province of China[CMS-CSST-2021-A06] ; China Manned Space Project
语种英语
学科领域天文学 ; 星系与宇宙学
文章类型Article
出版者IOP Publishing Ltd
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS记录号WOS:001360564400001
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]BROAD-LINE REGION ; SUPERMASSIVE BLACK-HOLES ; H-BETA ; EMISSION-LINE ; MONITORING PROJECT ; SEYFERT-GALAXIES ; VARIABILITY ; AGN ; SIZE ; MASS
引用统计
文献类型期刊论文
版本出版稿
条目标识符http://ir.ynao.ac.cn/handle/114a53/27795
专题南方基地
中国科学院天体结构与演化重点实验室
星系类星体研究组
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, Yunnan, People's Republic of China; [email protected];
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, Yunnan, People's Republic of China;
3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, People's Republic of China;
4.Key Laboratory of Radio Astronomy and Technology, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100101, People's Republic of China;
5.Department of Astronomy, School of Physics, Peking University, Beijing 100871, People's Republic of China;
6.Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, People's Republic of China;
7.Department of Astronomy, Xiamen University, Xiamen, Fujian 361005, People's Republic of China;
8.South-Western Institute for Astronomy Research, Yunnan University, Kunming 650500, People's Republic of China
第一作者单位中国科学院云南天文台
推荐引用方式
GB/T 7714		 Feng HC,Li SS,Bai JM,et al. Velocity-resolved Reverberation Mapping of Changing-look Active Galactic Nucleus NGC 4151 during Outburst Stage. II. Results of Four Seasons of Observation[J]. ASTROPHYSICAL JOURNAL,2024,976(2).
APA 封海成.,李莎莎.,白金明.,刘洪涛.,卢开兴.,...&Zhou, Shuying.(2024).Velocity-resolved Reverberation Mapping of Changing-look Active Galactic Nucleus NGC 4151 during Outburst Stage. II. Results of Four Seasons of Observation.ASTROPHYSICAL JOURNAL,976(2).
MLA 封海成,et al."Velocity-resolved Reverberation Mapping of Changing-look Active Galactic Nucleus NGC 4151 during Outburst Stage. II. Results of Four Seasons of Observation".ASTROPHYSICAL JOURNAL 976.2(2024).
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