Piercing through Highly Obscured and Compton-thick AGNs in the Chandra Deep Fields. II. Are Highly Obscured AGNs the Missing Link in the Merger-triggered AGN–Galaxy Coevolution Models?
文献类型：期刊论文
| 作者 | Li,Junyao2,3; Xue,Yongquan2,3; Sun,Mouyuan4; Brandt,William N.5,6,7; Yang,Guang5,6,8,9; Vito,Fabio10,11; Tozzi,Paolo12; Vignali,Cristian1,13; Comastri,Andrea1; Shu,Xinwen14 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2020-10-30 |
| 卷号 | 903期号:1 |
| 关键词 | AGN host galaxies Active galaxies X-ray active galactic nuclei |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/abb6e7 |
| 英文摘要 | Abstract By using a large, highly obscured ( ) active galactic nucleus (AGN) sample (294 sources at z?～?0–5) selected from detailed X-ray spectral analyses in the deepest Chandra?surveys, we explore distributions of these X-ray sources in various optical/infrared/X-ray color–color diagrams and their host-galaxy properties, aiming at characterizing the nuclear obscuration environment and the triggering mechanism of highly obscured AGNs. We find that the refined Infrared Array Camera (IRAC) color–color diagram fails to identify the majority of X-ray-selected, highly obscured AGNs, even for the most luminous sources with . Over 80% of our sources will not be selected as heavily obscured candidates using the flux ratio of and R???K?>?4.5 criteria, implying complex origins and conditions for the obscuring materials that are responsible for the heavy X-ray obscuration. The average star formation rate (SFR) of highly obscured AGNs is similar to that of stellar mass- (M*-) and z-controlled normal galaxies, while a lack of quiescent hosts is observed for the former. Partial correlation analyses imply that highly obscured AGN activity (traced by ) appears to be more fundamentally related to M*, and no dependence of ?on either M* or SFR is detected. Morphology analyses reveal that 61% of our sources have a significant disk component, while only ～27% of them exhibit irregular morphological signatures. These findings together point toward a scenario where secular processes (e.g., galactic-disk instabilities), instead of mergers, are most probable to be the leading mechanism that triggers accretion activities of X-ray-selected, highly obscured AGNs. |
| 语种 | 英语 |
| WOS记录号 | IOP:0004-637X-903-1-ABB6E7 |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/62209]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Li,Junyao |
| 作者单位 | 1.INAF—Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, Via Gobetti 93/3, I-40129 Bologna, Italy 2.CAS Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, University of Science and Technology of China, Hefei 230026, People’s Republic of China; lijunyao@mail.ustc.edu.cn, xuey@ustc.edu.cn 3.School of Astronomy and Space Science, University of Science and Technology of China, Hefei 230026, People’s Republic of China 4.Department of Astronomy, Xiamen University, Xiamen, Fujian 361005, People’s Republic of China 5.Department of Astronomy & Astrophysics, 525 Davey Lab, The Pennsylvania State University, University Park, PA 16802, USA 6.Institute for Gravitation and the Cosmos, The Pennsylvania State University, University Park, PA 16802, USA 7.Department of Physics, The Pennsylvania State University, University Park, PA 16802, USA 8.Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843-4242, USA 9.George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, TX 77843-4242, USA 10.Instituto de Astrofisica and Centro de Astroingenieria, Facultad de Fisica, Pontificia Universidad Catolica de Chile, Casilla 306, Santiago 22, Chile |
| 推荐引用方式 GB/T 7714 | Li,Junyao,Xue,Yongquan,Sun,Mouyuan,et al. Piercing through Highly Obscured and Compton-thick AGNs in the Chandra Deep Fields. II. Are Highly Obscured AGNs the Missing Link in the Merger-triggered AGN–Galaxy Coevolution Models?[J]. The Astrophysical Journal,2020,903(1). |
| APA | Li,Junyao.,Xue,Yongquan.,Sun,Mouyuan.,Brandt,William N..,Yang,Guang.,...&Zheng,Xuechen.(2020).Piercing through Highly Obscured and Compton-thick AGNs in the Chandra Deep Fields. II. Are Highly Obscured AGNs the Missing Link in the Merger-triggered AGN–Galaxy Coevolution Models?.The Astrophysical Journal,903(1). |
| MLA | Li,Junyao,et al."Piercing through Highly Obscured and Compton-thick AGNs in the Chandra Deep Fields. II. Are Highly Obscured AGNs the Missing Link in the Merger-triggered AGN–Galaxy Coevolution Models?".The Astrophysical Journal 903.1(2020). |
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来源：国家天文台
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