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, 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
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2016-08-20 |
| 卷号 | 827期号:2 |
| ISSN号 | 0004-637X |
| 关键词 | galaxies: active galaxies: individual (NGC 5548) galaxies: nuclei |
| 通讯作者 | Wang, JM (reprint author), Chinese Acad Sci, Natl Astron Observ China, Beijing 100020, Peoples R China. |
| 产权排序 | 第三完成单位 |
| 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. |
| 学科主题 | Astronomy & Astrophysics |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | 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 |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/article/10.3847/0004-637X/827/2/118/meta |
| 语种 | 英语 |
| WOS记录号 | WOS:000384001600030 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/9722]  |
| 专题 | 云南天文台_丽江天文观测站（南方基地） |
| 作者单位 | 1.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 |
| 推荐引用方式 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). |
入库方式： OAI收割
来源：云南天文台
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