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Reverberation Mapping of Two Variable Active Galactic Nuclei: Probing the Distinct Characteristics of the Inner and Outer Broad-line Regions
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; Xu, Yerong8,9; Zhang, Yang-Wei10; Zhou, Shuying7
发表期刊ASTROPHYSICAL JOURNAL
2025-02-01
卷号979期号:2
DOI10.3847/1538-4357/ad9c71
产权排序第1完成单位
收录类别SCI
摘要Current reverberation mapping (RM) studies primarily focus on single emission lines, particularly the H beta line, which may not fully reveal the geometry and kinematic properties of the broad-line region (BLR). To overcome this limitation, we have conducted multiline RM observations on two highly variable active galactic nuclei (AGNs), KUG 1141+371 and UGC 3374, using the Lijiang 2.4 m telescope. Our goal was to investigate the detailed structures of different regions within the BLR. We measured the time lags of multiple broad emission lines (H alpha, H beta, H gamma, He i, and He ii) and found clear evidence of radial ionization stratification in the BLRs of both AGNs. Velocity-resolved RM analysis revealed distinct geometry and kinematics between the inner and outer regions of the BLRs. Assuming that the velocity-resolved lags reflect the kinematics of the BLR, our observations indicate that: (1) in KUG 1141+371, the inner BLR exhibits outflow signatures, while the outer region is consistent with virialized motion; and (2) in UGC 3374, the inner region displays virial motion, while the outer region shows inflow. Furthermore, we detected breathing behavior in the outer BLR regions of both AGNs, while the inner BLR regions show anti-breathing, which may be linked to intrinsic BLR properties. We discuss these findings in the context of various BLR formation models, highlighting the importance of long-term, multiline RM campaigns in understanding of BLR structure and evolution. Additionally, our results suggest that the observed stratification in BLR geometry and kinematics may contribute to the scatter in black hole mass estimates and the rapid changes in velocity-resolved RM signatures reported in recent studies.
资助项目National Key R&D Program of China; National Natural Science Foundation of China[12303022]; National Natural Science Foundation of China[12203096]; National Natural Science Foundation of China[12373018]; National Natural Science Foundation of China[11991051]; National Natural Science Foundation of China[12322303]; National Natural Science Foundation of China[12203041]; National Natural Science Foundation of China[12073068]; Yunnan Fundamental Research Projects[202301AT070358]; Yunnan Fundamental Research Projects[202301AT070339]; Yunnan Postdoctoral Research Foundation; Special Research Assistant Funding Project of the Chinese Academy of Sciences; Natural Science Foundation of Fujian Province of China[2022J06002]; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2022058]; Young Talent Project of Yunnan Province; China Manned Space Project[CMS-CSST-2021-A06]; Chinese Academy of Sciences; People's Government of Yunnan Province; National Science Foundation[AST-1440341]; National Science Foundation[AST-2034437]; Oskar Klein Center at Stockholm University; Drexel University;[2021YFA1600404]
项目资助者National Key R&D Program of China ; National Natural Science Foundation of China[12303022, 12203096, 12373018, 11991051, 12322303, 12203041, 12073068] ; Yunnan Fundamental Research Projects[202301AT070358, 202301AT070339] ; Yunnan Postdoctoral Research Foundation ; Special Research Assistant Funding Project of the Chinese Academy of Sciences ; Natural Science Foundation of Fujian Province of China[2022J06002] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2022058] ; Young Talent Project of Yunnan Province ; China Manned Space Project[CMS-CSST-2021-A06] ; Chinese Academy of Sciences ; People's Government of Yunnan Province ; National Science Foundation[AST-1440341, AST-2034437] ; Oskar Klein Center at Stockholm University ; Drexel University ; [2021YFA1600404]
语种英语
学科领域天文学 ; 天体物理学 ; 高能天体物理学 ; 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:001402263600001
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]SUPERMASSIVE BLACK-HOLES ; HIGH ACCRETION RATES ; OPTIMALLY EMITTING CLOUDS ; H-BETA EMISSION ; MONITORING PROJECT ; RADIATION PRESSURE ; SEYFERT-GALAXIES ; LUMINOSITY END ; MAIN-SEQUENCE ; DISK WINDS
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文献类型期刊论文
版本出版稿
条目标识符http://ir.ynao.ac.cn/handle/114a53/28063
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], [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.INAF—IASF Palermo, Via U. La Malfa 153, I-90146 Palermo, Italy;
9.Department of Astronomy & Physics, Saint Mary's University, 923 Robie Street, Halifax, NS B3H 3C3, Canada;
10.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. Reverberation Mapping of Two Variable Active Galactic Nuclei: Probing the Distinct Characteristics of the Inner and Outer Broad-line Regions[J]. ASTROPHYSICAL JOURNAL,2025,979(2).
APA 封海成.,李莎莎.,白金明.,刘洪涛.,卢开兴.,...&Zhou, Shuying.(2025).Reverberation Mapping of Two Variable Active Galactic Nuclei: Probing the Distinct Characteristics of the Inner and Outer Broad-line Regions.ASTROPHYSICAL JOURNAL,979(2).
MLA 封海成,et al."Reverberation Mapping of Two Variable Active Galactic Nuclei: Probing the Distinct Characteristics of the Inner and Outer Broad-line Regions".ASTROPHYSICAL JOURNAL 979.2(2025).
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