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REVERBERATION MAPPING OF THE BROAD-LINE REGION IN NGC 5548: EVIDENCE FOR RADIATION PRESSURE?
Lu KX(卢开兴); Du P(杜璞); Hu C(胡晨); Li YR(李彦荣); Zhang ZX(张志翔); Wang K(王凯); Huang YK(黄颖科); Wang JM(王建民); Lu, KX; Du, P; Hu, C; Li, YR; Zhang, ZX; Wang, K; Huang, YK; Bi, SL; Bai, JM; Ho, LC; Wang, JM
2016
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
EISSN1538-4357
Volume827Issue:2Pages:118
Corresponding Author王建民
SubtypeArticle
AbstractNGC 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.
Keywordgalaxies: active galaxies: individual (NGC 5548) galaxies: nuclei
DOI10.3847/0004-637X/827/2/118
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
Indexed BySCI ; ADS ; ADS
Language英语
WOS IDWOS:000384001600030
ADS Bibcode2016ApJ...827..118L
ADS URLhttps://ui.adsabs.harvard.edu/abs/2016ApJ...827..118L
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2016ApJ...827..118L/citations
Citation statistics
Cited Times:52 [ADS]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/260823
Collection粒子天体物理中心
Affiliation中国科学院高能物理研究所
Recommended Citation
GB/T 7714
Lu KX,Du P,Hu C,et al. REVERBERATION MAPPING OF THE BROAD-LINE REGION IN NGC 5548: EVIDENCE FOR RADIATION PRESSURE?[J]. ASTROPHYSICAL JOURNAL,2016,827(2):118.
APA 卢开兴.,杜璞.,胡晨.,李彦荣.,张志翔.,...&Wang, JM.(2016).REVERBERATION MAPPING OF THE BROAD-LINE REGION IN NGC 5548: EVIDENCE FOR RADIATION PRESSURE?.ASTROPHYSICAL JOURNAL,827(2),118.
MLA 卢开兴,et al."REVERBERATION MAPPING OF THE BROAD-LINE REGION IN NGC 5548: EVIDENCE FOR RADIATION PRESSURE?".ASTROPHYSICAL JOURNAL 827.2(2016):118.
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