Evidence for Two Distinct Broad-line Regions from Reverberation Mapping of PG 0026+129
文献类型：期刊论文
| 作者 | Hu,Chen1; Li,Sha-Sha1,2; Guo,Wei-Jian1,2; Yang,Sen1,2; Yang,Zi-Xu1,2; Bao,Dong-Wei1,2; Jiang,Bo-Wei1,2; Du,Pu1; Li,Yan-Rong1; Xiao,Ming1 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2020-12-01 |
| 卷号 | 905期号:1 |
| ISSN号 | 0004-637X |
| 关键词 | Supermassive black holes Seyfert galaxies Active galactic nuclei Quasars Reverberation mapping Time domain astronomy |
| DOI | 10.3847/1538-4357/abc2da |
| 通讯作者 | Hu,Chen() |
| 英文摘要 | Abstract We report on the results of a new spectroscopic monitoring campaign of the quasar PG 0026+129 at the Calar Alto Observatory 2.2 m telescope from 2017 July to 2020 February. Significant variations in the fluxes of the continuum and broad emission lines, including Hβ and He ii, were observed in the first and third years, and clear time lags between them are measured. The broad Hβ line profile consists of two Gaussian components: an intermediate-width H with an FWHM of 1964?±?18 and another very broad H with an FWHM of 7570?±?83 . H has long time lags of ～40–60 days in the rest frame, while H shows nearly zero time delay with respect to the optical continuum at 5100 ?. The velocity-resolved delays show consistent results: lags of ～30–50 days at the core of the broad Hβ line and roughly zero lags at the wings. H has a redshift of ～400 , which seems to be stable for nearly 30 yr by comparing with archived spectra, and may originate from an infall. The rms spectrum of H shows a double-peaked profile with brighter blue peak and extended red wing in the first year, which matches the signature of a thin disk. Both the double-peaked profile and the near-zero lag suggest that H comes from a region associated with the part of the accretion disk that emits the optical continuum. Adopting the FWHM (in the rms spectrum) and the time lag measured for the total Hβ?line, and a virial factor of 1.5, we obtain a virial mass of for the central black hole in this quasar. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-637X-905-1-ABC2DA |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/24003]  |
| 专题 | 云南天文台_丽江天文观测站（南方基地） |
| 通讯作者 | Hu,Chen; Wang, Jian-Min |
| 作者单位 | 1.Key Laboratory for Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Beijing 100049, People’s Republic of China; wangjm@ihep.ac.cn 2.School of Astronomy and Space Science, University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, People’s Republic of China 3.Yunnan Observatories, The Chinese Academy of Sciences, Kunming 650011, People’s Republic of China 4.Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, People’s Republic of China 5.Department of Astronomy, School of Physics, Peking University, Beijing 100871, People’s Republic of China 6.Physics Department, Nanjing Normal University, Nanjing 210097, People’s Republic of China 7.Department of Physics and Astronomy, University of Wyoming, Laramie, WY 82071, USA 8.Department of Astronomy, University of Science and Technology of China, Hefei 230026, People’s Republic of China 9.Centro Astronomico Hispano Alemán, Sierra de los filabres sn, E-04550 Gérgal, Almería, Spain 10.Instituto de Astrofísica de Andalucía (CSIC), Glorieta de la astronomía sn, E-18008 Granada, Spain |
| 推荐引用方式 GB/T 7714 | Hu,Chen,Li,Sha-Sha,Guo,Wei-Jian,et al. Evidence for Two Distinct Broad-line Regions from Reverberation Mapping of PG 0026+129[J]. The Astrophysical Journal,2020,905(1). |
| APA | Hu,Chen.,Li,Sha-Sha.,Guo,Wei-Jian.,Yang,Sen.,Yang,Zi-Xu.,...&Bai JM.(2020).Evidence for Two Distinct Broad-line Regions from Reverberation Mapping of PG 0026+129.The Astrophysical Journal,905(1). |
| MLA | Hu,Chen,et al."Evidence for Two Distinct Broad-line Regions from Reverberation Mapping of PG 0026+129".The Astrophysical Journal 905.1(2020). |
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来源：云南天文台
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