REVERBERATION MAPPING OF THE BROAD-LINE REGION IN NGC 5548: EVIDENCE FOR RADIATION PRESSURE?
文献类型：期刊论文
| 作者 | 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
|
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2016 |
| 卷号 | 827期号:2 |
| 关键词 | galaxies: active galaxies: individual (NGC 5548) galaxies: nuclei |
| DOI | 10.3847/0004-637X/827/2/118 |
| 通讯作者 | 王建民 |
| 英文摘要 | 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. |
| 语种 | 英语 |
| WOS记录号 | WOS:000384001600030 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/260823]  |
| 专题 | 高能物理研究所_粒子天体物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 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). |
| 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). |
| 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). |
入库方式： OAI收割
来源：高能物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。