Constraining broad-line regions from time lags of broad emission lines relative to radio emission
文献类型：期刊论文
| 作者 | Liu HT(刘洪涛)1,2 ; Bai JM(白金明)1,2; Wang, JM3,4; Li SK(李少昆)1,2
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2011-11 |
| 卷号 | 418期号:1页码:90-95 |
| ISSN号 | 0035-8711 |
| 关键词 | galaxies: active galaxies: jets quasars: emission lines quasars: individual: 3C 273 radio continuum: galaxies |
| 通讯作者 | Liu, HT (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Yunnan, Peoples R China. |
| 产权排序 | 第一完成单位 |
| 英文摘要 | In this paper, a new method is proposed to estimate the broad-line region sizes of ultraviolet (UV) lines RuvBLR. It is applied to 3C 273. First, we derive the time lags of radio emission relative to broad emission lines Lya and C iv by the z-transformed discrete correlation function (ZDCF) method. The broad lines lag the 5-, 8-, 15-, 22- and 37-GHz emission. The measured lags tuvob are of the order of years. For a given line, tuvob decreases as the radio frequency increases. This trend results from the radiative cooling of relativistic electrons. Both UV lines have a lag of tuvob=-2.74+0.06- 0.25 yr relative to the 37-GHz emission. These results are consistent with those derived from the Balmer lines in Paper I. Secondly, we derive the time lags of the lines Lya, C iv, H, H beta and Ha relative to the 37-GHz emission by the flux randomization/random subset selection (FR/RSS) Monte Carlo method. The measured lags are tob=-3.40+0.31- 0.05, -3.40+0.41- 0.14, -2.06+0.36- 0.92, -3.40+1.15- 0.20 and -3.56+0.35- 0.18 yr for the lines Lya, C iv, H, H beta and Ha, respectively. These estimated lags are consistent with those derived by the ZDCF method within the uncertainties. Based on the new method, we derive RuvBLR= 2.54+0.71- 0.35 to 4.01+0.90- 1.16 and 2.54+0.80- 0.43 to 4.01+0.98- 1.24 light-years for the Lya and C iv lines, respectively. Considering the uncertainties, these estimated sizes are consistent with those obtained in the classical reverberation mapping for the UV and the Balmer lines. This indicates that their emitting regions are not separated so large as in the classical mapping of the UV and optical lines. These results seem to depart from the stratified ionization structures obtained in the classical mapping. |
| 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 ; X-RAY ; BLACK-HOLE ; 3C 273 ; MULTIWAVELENGTH OBSERVATIONS ; OBSERVATIONAL EVIDENCE ; OPTICAL VARIABILITY ; ACCRETION DISKS ; CENTRAL MASSES ; QUASAR 3C-273 |
| 收录类别 | SCI |
| 原文出处 | http://mnras.oxfordjournals.org/content/418/1/90 |
| 语种 | 英语 |
| WOS记录号 | WOS:000297045700039 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/5401]  |
| 专题 | 云南天文台_丽江天文观测站（南方基地） 云南天文台_中国科学院天体结构与演化重点实验室 |
| 作者单位 | 1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming, Yunnan 650011, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, Yunnan 650011, China 3.Key Laboratory for Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Beijing 100049, China 4.Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing 100049, China |
| 推荐引用方式 GB/T 7714 | Liu HT,Bai JM,Wang, JM,et al. Constraining broad-line regions from time lags of broad emission lines relative to radio emission[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2011,418(1):90-95. |
| APA | Liu HT,Bai JM,Wang, JM,&Li SK.(2011).Constraining broad-line regions from time lags of broad emission lines relative to radio emission.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,418(1),90-95. |
| MLA | Liu HT,et al."Constraining broad-line regions from time lags of broad emission lines relative to radio emission".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 418.1(2011):90-95. |
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来源：云南天文台
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