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A High-quality Velocity-delay Map of the Broad-line Region in NGC 5548
Xiao M(肖铭)1,2,3; Du, Pu2; Lu KX(卢开兴)1; Hu, Chen2; Li, Yan-Rong2; Zhang, Zhi-Xiang2; Wang, Kai2; Huang, Ying-Ke2; Bai JM(白金明)1; Bian, Wei-Hao4; Ho, Luis C.5,6; Yuan, Ye-Fei7; Wang, Jian-Min2,3,8
发表期刊ASTROPHYSICAL JOURNAL LETTERS
2018-09-20
卷号865期号:1页码:6
DOI10.3847/2041-8213/aadf8f
产权排序第1完成单位
收录类别SCI
关键词Galaxies: Active Galaxies: Individual (Ngc 5548) Galaxies: Nuclei Galaxies: Seyfert
摘要

NGC 5548 has been well spectroscopically monitored for reverberation mapping of the central kinematics by 19 campaigns. Using the maximum entropy method in this Letter, we build up a high-quality velocity-delay map of the H beta emission line in the light curves of the continuum and the line variations observed between 2015 and 2016. The map shows the response strength and lags of the velocity fields of the H beta-emitting regions. The velocity-delay structure of the map is generally symmetric, with strong red and blue wings at time lag tau less than or similar to 15 days, a narrower velocity distribution at tau greater than or similar to 15 days, and a deficit of response in the core. This is suggestive of a disk geometry of the broad-line region (BLR). The relatively weaker H beta response at the longer lags in the red side indicates anisotropic emission from the outer part of the BLR. We also recover the velocity-delay maps of NGC. 5548 from the historical data of 13 years to investigate the long-term variability of its BLR. In general, the BLR of NGC 5548 was switching between the inflow and virialized phases in the past years. The resultant maps of seven years reveal inflow signatures and show decreasing lags, indicating that the changes in the BLR size are related to the infalling BLR gas. The other four maps show potential disk signatures that are similar to our map.

资助项目CAS ; People's Government of Yunnan Province ; National Key R&D Program of China[2016YFA0400701] ; National Key R&D Program of China[2016YFA0400702] ; NSFC[NSFC-11233003] ; NSFC[NSFC-11573026] ; Key Research Program of the CAS[KJZD-EW-M06] ; NSFC[NSFC-11503026] ; NSFC[NSFC-11703077] ; NSFC[NSFC-11773029] ; Key Research Program of Frontier Sciences, CAS[QYZDJ-SSWSLH007]
语种英语
学科领域天文学
学科门类理学 ; 理学::天文学
文章类型Article
出版者IOP PUBLISHING LTD
ISSN2041-8205
URL查看原文
WOS记录号WOS:000445132200004
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]Active Galactic Nuclei ; Agn Monitoring Project ; Reverberation Mapping Data ; Black-hole ; Emission-lines ; Disk Winds ; Arp 151 ; Mass ; Inversion ; Dynamics
引用统计
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/17861
专题丽江天文观测站(南方基地)
通讯作者Du, Pu; Bai JM(白金明)
作者单位1.Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, Yunnan, People's Republic of China
2.Key Laboratory for Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Beijing 100049, People's Republic of China
3.University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, People's Republic of China
4.Physics Department, Nanjing Normal University, Nanjing 210097, People's Republic of China
5.Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, People's Republic of China
6.Department of Astronomy, School of Physics, Peking University, Beijing 100871, People's Republic of China
7.Department of Astronomy, University of Science and Technology of China, Hefei 230026, People's Republic of China
8.National Astronomical Observatories of China, Chinese Academy of Sciences, 20A Datun Road, Beijing 100020, People's Republic of China
推荐引用方式
GB/T 7714
Xiao M,Du, Pu,Lu KX,et al. A High-quality Velocity-delay Map of the Broad-line Region in NGC 5548[J]. ASTROPHYSICAL JOURNAL LETTERS,2018,865(1):6.
APA Xiao M.,Du, Pu.,Lu KX.,Hu, Chen.,Li, Yan-Rong.,...&Wang, Jian-Min.(2018).A High-quality Velocity-delay Map of the Broad-line Region in NGC 5548.ASTROPHYSICAL JOURNAL LETTERS,865(1),6.
MLA Xiao M,et al."A High-quality Velocity-delay Map of the Broad-line Region in NGC 5548".ASTROPHYSICAL JOURNAL LETTERS 865.1(2018):6.
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