Revisiting correlations between broad-line and jet emission variations for AGNs: 3C 120 and 3C 273
文献类型：期刊论文
| 作者 | Liu HT(刘洪涛)1,2 ; Bai JM(白金明)1,2; Feng HC(封海成)1,2,3; 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 | 2015-06-11 |
| 卷号 | 450期号:1页码:494-503 |
| 关键词 | galaxies: active galaxies: individual: 3C 120 galaxies: individual: 3C 273 galaxies: jets quasars: emission lines radio continuum: galaxies |
| ISSN号 | 0035-8711 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Liu, HT (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan, Peoples R China. |
| 英文摘要 | We restudy the issue of cross-correlations between broad-line and jet emission variations, and aim to locate the position of a radio (and gamma-ray) emitting region in a jet of active galactic nuclei. Considering the radial profiles of the radius and number density of clouds in a spherical broad-line region (BLR), we derive new formulae connecting the jet-emitting position R-jet to the time lag tau(ob) between broad-line and jet emission variations, and the BLR radius. Also, formulae are derived for a disc-like BLR and a spherical shell BLR. The model-independent flux randomization/random subset selection method is used to estimate tau(ob). For 3C 120, positive lags of about 0.3 yr are found between the 15 GHz emission and the H beta, H gamma and He II lambda 686 lines, including broad-line data in a newly published paper, indicating that the line variations lead the 15 GHz ones. Each of the broad-line light curves corresponds to a radio outburst. R-jet = 1.1-1.5 parsec (pc) is obtained for 3C 120. For 3C 273, a common feature of negative time lags is found in the cross-correlation functions between light curves of radio emission and the Balmer lines, as well as Ly alpha lambda 1216 and CIV lambda 1549 lines. R-jet = 1.0-2.6 pc is obtained for 3C 273. The estimated R-jet is comparable for 3C 120 and 3C 273, and the gamma-ray-emitting positions will be within similar to 1-3 pc from the central engines. Comparisons show that the cloud number density and radius radial distributions and the BLR structures have only negligible effects on R-jet. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | ACTIVE GALACTIC NUCLEI ; GAMMA-RAY EMISSION ; DRIVEN DISK ACCRETION ; LARGE-AREA TELESCOPE ; HIGH-ENERGY EMISSION ; LOW-LUMINOSITY AGN ; SEYFERT 1 GALAXIES ; BLACK-HOLE MASS ; OBSERVATIONAL EVIDENCE ; OPTICAL CONTINUUM |
| 收录类别 | SCI |
| 原文出处 | http://mnras.oxfordjournals.org/content/450/1/494 |
| 语种 | 英语 |
| WOS记录号 | WOS:000356311600035 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/5464]  |
| 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.Yunnan Observatories, 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.University of Chinese Academy of Sciences, Beijing 100049, China |
| 推荐引用方式 GB/T 7714 | Liu HT,Bai JM,Feng HC,et al. Revisiting correlations between broad-line and jet emission variations for AGNs: 3C 120 and 3C 273[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2015,450(1):494-503. |
| APA | Liu HT,Bai JM,Feng HC,&Li SK.(2015).Revisiting correlations between broad-line and jet emission variations for AGNs: 3C 120 and 3C 273.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,450(1),494-503. |
| MLA | Liu HT,et al."Revisiting correlations between broad-line and jet emission variations for AGNs: 3C 120 and 3C 273".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 450.1(2015):494-503. |
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来源：云南天文台
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