Outflows from active galactic nuclei: the BLR-NLR metallicity correlation
文献类型：期刊论文
| 作者 | Du, Pu1; Wang, Jian-Min1,2; Hu, Chen1; Valls-Gabaud, David1,2,3; Baldwin, Jack A.4; Ge, Jun-Qiang2 ; Xue, Sui-Jian2
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2014-03-01 |
| 卷号 | 438期号:4页码:2828-2838 |
| 关键词 | accretion, accretion discs black hole physics ISM: jets and outflows galaxies: abundances galaxies: active galaxies: nuclei |
| 英文摘要 | The metallicity of active galactic nuclei (AGNs), which can be measured by emission line ratios in their broad- and narrow-line regions (BLRs and NLRs), provides invaluable information about the physical connection between the different components of AGNs. From the archival data bases of the International Ultraviolet Explorer, the Hubble Space Telescope and the Sloan Digital Sky Survey, we have assembled the largest sample available of AGNs which have adequate spectra in both the optical and ultraviolet bands to measure the narrow-line ratio [N ii]/H alpha and also, in the same objects, the broad-line N v/C iv ratio. These permit the measurement of the metallicities in the NLRs and BLRs in the same objects. We find that neither the BLR nor the NLR metallicity correlate with black hole masses or Eddington ratios, but there is a strong correlation between NLR and BLR metallicities. This metallicity correlation implies that outflows from BLRs carry metal-rich gas to NLRs at characteristic radial distances of similar to 1.0 kpc. This chemical connection provides evidence for a kinetic feedback of the outflows to their hosts. Metals transported into the NLR enhance the cooling of the ISM in this region, leading to local star formation after the AGNs turn to narrow-line low-ionization nuclear emission-line regions. This post-AGN star formation is predicted to be observable as an excess continuum emission from the host galaxies in the near-infrared and ultraviolet, which needs to be further explored. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000332038000008 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6385]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ China, Beijing 100020, Peoples R China 3.Observ Paris, CNRS UMR 8112, LERMA, F-75014 Paris, France 4.Michigan State Univ, Phys & Astron Dept, E Lansing, MI 48824 USA |
| 推荐引用方式 GB/T 7714 | Du, Pu,Wang, Jian-Min,Hu, Chen,et al. Outflows from active galactic nuclei: the BLR-NLR metallicity correlation[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2014,438(4):2828-2838. |
| APA | Du, Pu.,Wang, Jian-Min.,Hu, Chen.,Valls-Gabaud, David.,Baldwin, Jack A..,...&Xue, Sui-Jian.(2014).Outflows from active galactic nuclei: the BLR-NLR metallicity correlation.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,438(4),2828-2838. |
| MLA | Du, Pu,et al."Outflows from active galactic nuclei: the BLR-NLR metallicity correlation".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 438.4(2014):2828-2838. |
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来源：国家天文台
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