DETECTION OF THE INTERMEDIATE-WIDTH EMISSION LINE REGION IN QUASAR OI 287 WITH THE BROAD EMISSION LINE REGION OBSCURED BY THE DUSTY TORUS
文献类型：期刊论文
| 作者 | Li, Zhenzhen1,2,3 ; Zhou, Hongyan1,2,3; Hao, Lei4; Wang, Huiyuan1,3; Ji, Tuo2,3; Shi, Xiheng2; Liu, Bo1,2,3; Zhang, Shaohua2; Liu, Wen-Juan1,2,3; Pan, Xiang1,2,3
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2015-10-20 |
| 卷号 | 812期号:2 |
| 关键词 | galaxies: active galaxies: nuclei quasars: emission lines |
| 英文摘要 | The existence of intermediate-width emission line regions (IELRs) in active galactic nuclei has been discussed for over two decades. A consensus, however, is yet to be arrived at due to the lack of convincing evidence for their detection. We present a detailed analysis of the broadband spectrophotometry of the partially obscured quasar OI 287. The ultraviolet intermediate-width emission lines (IELs) are very prominent, in high contrast to the corresponding broad emission lines (BELs) which are heavily suppressed by dust reddening. Assuming that the IELR is virialized, we estimated its distance to the central black hole to be similar to 2.9 pc, similar to the dust sublimation radius of similar to 1.3 pc. Photo-ionization calculations suggest that the IELR has a hydrogen density of similar to 10(8.8)-10(9.4) cm(-3), within the range of values quoted for the dusty torus near the sublimation radius. Both its inferred location and physical conditions suggest that the IELR originates from the inner surface of the dusty torus. In the spectrum of this quasar, we identified only one narrow absorption-line system associated with the dusty material. With the aid of photo-ionization model calculations, we found that the obscuring material might originate from an outer region of the dusty torus. We speculate that the dusty torus, which is exposed to the central ionizing source, may produce IELs through photo-ionization processes, as well as obscure BELs as a natural "coronagraph." Such a "coronagraph" could be found in a large number of partially obscured quasars and may be a useful tool to study IELRs. |
| 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 ; DIGITAL SKY SURVEY ; SMALL-MAGELLANIC-CLOUD ; C-IV LAMBDA-1549 ; 7TH DATA RELEASE ; H-BETA ; SEYFERT-1 GALAXIES ; PG 0052+251 ; II QUASARS ; MILKY-WAY |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000365206600011 |
| 公开日期 | 2016-01-19 |
| 源URL | [http://119.78.226.72/handle/331011/28398]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Univ Sci & Technol China, Dept Astron, Hefei 230026, Anhui, Peoples R China 2.Polar Res Inst China, Shanghai 200136, Peoples R China 3.Chinese Acad Sci, Univ Sci & Technol China, Key Lab Res Galaxies & Cosmol, Hefei 230026, Anhui, Peoples R China 4.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Zhenzhen,Zhou, Hongyan,Hao, Lei,et al. DETECTION OF THE INTERMEDIATE-WIDTH EMISSION LINE REGION IN QUASAR OI 287 WITH THE BROAD EMISSION LINE REGION OBSCURED BY THE DUSTY TORUS[J]. ASTROPHYSICAL JOURNAL,2015,812(2). |
| APA | Li, Zhenzhen.,Zhou, Hongyan.,Hao, Lei.,Wang, Huiyuan.,Ji, Tuo.,...&Jiang, Peng.(2015).DETECTION OF THE INTERMEDIATE-WIDTH EMISSION LINE REGION IN QUASAR OI 287 WITH THE BROAD EMISSION LINE REGION OBSCURED BY THE DUSTY TORUS.ASTROPHYSICAL JOURNAL,812(2). |
| MLA | Li, Zhenzhen,et al."DETECTION OF THE INTERMEDIATE-WIDTH EMISSION LINE REGION IN QUASAR OI 287 WITH THE BROAD EMISSION LINE REGION OBSCURED BY THE DUSTY TORUS".ASTROPHYSICAL JOURNAL 812.2(2015). |
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来源：上海天文台
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