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)![]() ![]() ![]() ![]() ![]() | |
2016 | |
Source Publication | ASTROPHYSICAL JOURNAL
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ISSN | 0004-637X |
EISSN | 1538-4357 |
Volume | 827Issue:2Pages:118 |
Corresponding Author | 王建民 |
Subtype | Article |
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. |
Keyword | galaxies: active galaxies: individual (NGC 5548) galaxies: nuclei |
DOI | 10.3847/0004-637X/827/2/118 |
WOS Keyword | ACTIVE 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 By | SCI ; ADS ; ADS |
Language | 英语 |
WOS ID | WOS:000384001600030 |
ADS Bibcode | 2016ApJ...827..118L |
ADS URL | https://ui.adsabs.harvard.edu/abs/2016ApJ...827..118L |
ADS CITATIONS | https://ui.adsabs.harvard.edu/abs/2016ApJ...827..118L/citations |
Citation statistics |
Cited Times:52 [ADS]
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Document Type | 期刊论文 |
Identifier | http://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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