Tidally disrupted dusty clumps as the origin of broad emission lines in active galactic nuclei
文献类型：期刊论文
| 作者 | Wang, Jian-Min1,2,3,4; Du, Pu1; Brotherton, Michael S.5; Hu, Chen1; Songsheng, Yu-Yang1; Li, Yan-Rong1; Shi, Yong6; Zhang, Zhi-Xiang1 |
| 刊名 | Nature astronomy
 |
| 出版日期 | 2017-11-01 |
| 卷号 | 1期号:11页码:775-783 |
| ISSN号 | 2397-3366 |
| DOI | 10.1038/s41550-017-0264-4 |
| 通讯作者 | Wang, jian-min(wangjm@ihep.ac.cn) |
| 英文摘要 | Type 1 active galactic nuclei display broad emission lines, which are regarded as arising from photoionized gas moving in the gravitational potential of a supermassive black hole(1,2). however, the origin of this broad-line region gas is unresolved so far(1-3). another component is the dusty tome beyond the broad-line region probably an assembly of discrete clumps(5-7) which can hide the region from some viewing angles and make them observationally appear as type 2 objects. here, we report that these clumps moving within the dust sublimation radius, such as the molecular cloud g2 discovered in the galactic centres, will be tidally disrupted by the black hole, resulting in some gas becoming bound at smaller radii while other gas is ejected and returns to the torus. the clumps fulfill necessary conditions to be photoionizeds. specific dynamical components of tidally disrupted clumps include spiral-in gas as inflow, circularized gas and ejecta as outflow. we calculated various profiles of emission lines from these clouds, and found that they generally agree with h beta profiles of palomar-green quasars's. we found that the asymmetry, shape and shift of the profiles strongly depend on [o-iii] luminosity, which we interpret as a proxy of dusty torus angles. tidally disrupted clumps from the torus may represent the source of the broad-line region gas. |
| WOS关键词 | DRIVEN DISK WINDS ; SEYFERT-GALAXIES ; BLACK-HOLE ; ACCRETION DISKS ; H-BETA ; THERMAL INSTABILITIES ; RELATIVE NUMBER ; NEARBY GALAXIES ; STAR-FORMATION ; QUASAR CLOUDS |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | NATURE PUBLISHING GROUP |
| WOS记录号 | WOS:000415271700004 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2176911 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Wang, Jian-Min |
| 作者单位 | 1.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, 19B Yuquan Rd, Beijing 100049, Peoples R China 2.Univ Chinese Acad Sci, Sch Astron & Space Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 3.Univ Chinese Acad Sci, Sch Phys Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Natl Astron Observ China, 20A Datun Rd, Beijing 100020, Peoples R China 5.Univ Wyoming, Dept Phys & Astron, Laramie, WY 82071 USA 6.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Jian-Min,Du, Pu,Brotherton, Michael S.,et al. Tidally disrupted dusty clumps as the origin of broad emission lines in active galactic nuclei[J]. Nature astronomy,2017,1(11):775-783. |
| APA | Wang, Jian-Min.,Du, Pu.,Brotherton, Michael S..,Hu, Chen.,Songsheng, Yu-Yang.,...&Zhang, Zhi-Xiang.(2017).Tidally disrupted dusty clumps as the origin of broad emission lines in active galactic nuclei.Nature astronomy,1(11),775-783. |
| MLA | Wang, Jian-Min,et al."Tidally disrupted dusty clumps as the origin of broad emission lines in active galactic nuclei".Nature astronomy 1.11(2017):775-783. |
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