Evolutionary consequences of dusty tori in active galactic nuclei
文献类型：期刊论文
| 作者 | Wang JM(王建民) ; Zhang EP(张恩鹏); Luo B(罗斌); Wang, JM; Zhang, EP; Luo, B
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2005 |
| 卷号 | 627期号:1页码:L5-L8 |
| 关键词 | galaxies : active galaxies : nuclei |
| 通讯作者 | Chinese Acad Sci, Inst High Energy Phys, High Energy Astrophys Lab, Beijing 100039, Peoples R China ; Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 英文摘要 | Deep surveys by Chandra and the Hubble Space Telescope (HST) show that active galactic nucleus (AGN) populations are changing with hard X-ray luminosities. Thus, an interesting question arises as to whether or not the dusty torus is evolving with the central engines. We assemble a sample of 50 radio-quiet Palomar-Green quasars to tackle this problem. The covering factors of the dusty tori can be estimated from the multiwavelength continuum. We find that they are strongly correlated with the hard X-ray luminosity. Interestingly, this correlation agrees with the fraction of type II AGNs discovered by Chandra and HST, implying strong evidence of the changing results of the AGN population from the evolution of the tori. We also find that the frequencies of the dips at around 1 mm in the continuum correlate with the covering factors in the present sample, indicating that the dip frequencies are adjusted by the covering factors. In the scenario of the fueling of a black hole from the torus, the covering factor is good, and the dip frequency is a potential indicator of the torus evolution. |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 原文出处 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000230086500002 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/240280]  |
| 专题 | 高能物理研究所_粒子天体物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Wang JM,Zhang EP,Luo B,et al. Evolutionary consequences of dusty tori in active galactic nuclei[J]. ASTROPHYSICAL JOURNAL,2005,627(1):L5-L8. |
| APA | 王建民,张恩鹏,罗斌,Wang, JM,Zhang, EP,&Luo, B.(2005).Evolutionary consequences of dusty tori in active galactic nuclei.ASTROPHYSICAL JOURNAL,627(1),L5-L8. |
| MLA | 王建民,et al."Evolutionary consequences of dusty tori in active galactic nuclei".ASTROPHYSICAL JOURNAL 627.1(2005):L5-L8. |
入库方式： OAI收割
来源：高能物理研究所
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