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REVERBERATION MAPPING OF THE BROAD-LINE REGION IN NGC 5548: EVIDENCE FOR RADIATION PRESSURE?
Lu, Kai-Xing1,2; Du, Pu2; Hu, Chen2; Li, Yan-Rong2; Zhang, Zhi-Xiang2; Wang, Kai2; Huang, Ying-Ke2; Bi, Shao-Lan1; Bai JM(白金明)3; Ho, Luis C.4,5; Wang, Jian-Min2,6
Source PublicationASTROPHYSICAL JOURNAL
2016-08-20
Volume827Issue:2
DOI10.3847/0004-637X/827/2/118
Contribution Rank第3完成单位
Indexed BySCI
KeywordGalaxies: Active Galaxies: Individual (Ngc 5548) Galaxies: Nuclei
Abstract

NGC 5548 is the best-observed reverberation-mapped active galactic nucleus with long-term, intensive monitoring. Here we report results from a new observational campaign between 2015 January and July. We measure the centroid time lag of the broad H beta emission line with respect to the 5100 angstrom continuum and obtain tau(cent) = 7.20(-0.35)(+1.33) days in the rest frame. This yields a black hole mass of M-center dot = 8.71(-2.61)(+3.217) x 10(7)M(circle dot) using a broad H beta line dispersion of 3124 +/- 302 km. s(-1) and a virial factor of f(BLR) = 6.3 +/- 1.5 for the broad-line region (BLR), consistent with the mass measurements from previous H beta campaigns. The high-quality data allow us to construct a velocity-binned delay map for the broad H beta line, which shows a symmetric response pattern around the line center, a plausible kinematic signature of virialized motion of the BLR. Combining all the available measurements of H beta time lags and the associated mean 5100 angstrom luminosities over 18 campaigns between 1989 and 2015, we find that the H beta BLR size varies with the mean optical luminosity, but, interestingly, with a possible delay of 2.35(-1.25)(+3.47) years. This delay coincides with the typical BLR dynamical timescale of NGC 5548, indicating that the BLR undergoes dynamical changes, possibly driven by radiation pressure.

Funding ProjectCAS ; People's Government of Yunnan Province ; Strategic Priority Research Program-The Emergence of Cosmological Structures of the Chinese Academy of Sciences[XDB09000000] ; NSFC[NSFC-11173023] ; NSFC[-11133006] ; NSFC[-11373024] ; NSFC[-11273007-11233003] ; NSFC[-11573026] ; NSFC[-11503026] ; NSFC[-11473002] ; NSFC-CAS joint key grant[U1431228]
Funding OrganizationCAS ; People's Government of Yunnan Province ; Strategic Priority Research Program-The Emergence of Cosmological Structures of the Chinese Academy of Sciences[XDB09000000] ; NSFC[NSFC-11173023, -11133006, -11373024, -11273007-11233003, -11573026, -11503026, -11473002] ; NSFC-CAS joint key grant[U1431228]
Language英语
Subject Area天文学 ; 天体物理学 ; 高能天体物理学 ; 星系与宇宙学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS IDWOS:000384001600030
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordACTIVE GALACTIC NUCLEI ; SUPERMASSIVE BLACK-HOLES ; AGN MONITORING PROJECT ; HIGH ACCRETION RATES ; VELOCITY-DELAY MAPS ; SEYFERT-GALAXIES ; ULTRAVIOLET OBSERVATIONS ; SPECTRAL VARIABILITY ; DYNAMICAL MODELS ; SPACE-TELESCOPE
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9722
Collection丽江天文观测站(南方基地)
Corresponding AuthorWang, Jian-Min
Affiliation1.Department of Astronomy, Beijing Normal University, Beijing 100875, China
2.Key Laboratory for Particle Astrophysics, Institute of High Energy Physics,Chinese Academy of Sciences, 19B Yuquan Road, Beijing 100049, China
3.Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, Yunnan, China
4.Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, China
5.Department of Astronomy, School of Physics, Peking University, Beijing 100871, China
6.National Astronomical Observatories of China, Chinese Academy of Sciences, 20A Datun Road, Beijing 100020, China
Recommended Citation
GB/T 7714
Lu, Kai-Xing,Du, Pu,Hu, Chen,et al. REVERBERATION MAPPING OF THE BROAD-LINE REGION IN NGC 5548: EVIDENCE FOR RADIATION PRESSURE?[J]. ASTROPHYSICAL JOURNAL,2016,827(2).
APA Lu, Kai-Xing.,Du, Pu.,Hu, Chen.,Li, Yan-Rong.,Zhang, Zhi-Xiang.,...&Wang, Jian-Min.(2016).REVERBERATION MAPPING OF THE BROAD-LINE REGION IN NGC 5548: EVIDENCE FOR RADIATION PRESSURE?.ASTROPHYSICAL JOURNAL,827(2).
MLA Lu, Kai-Xing,et al."REVERBERATION MAPPING OF THE BROAD-LINE REGION IN NGC 5548: EVIDENCE FOR RADIATION PRESSURE?".ASTROPHYSICAL JOURNAL 827.2(2016).
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