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?
Junyao Li, Yongquan Xue, Mouyuan Sun, William N. Brandt, Guang Yang, Fabio Vito, Paolo Tozzi, Cristian Vignali, Andrea Comastri, Xinwen Shu, Guanwen Fang, Lulu … 展开作者
Junyao Li, Yongquan Xue, Mouyuan Sun, William N. Brandt, Guang Yang, Fabio Vito, Paolo Tozzi, Cristian Vignali, Andrea Comastri, Xinwen Shu, Guanwen Fang, Lulu Fan, Bin Luo, Chien-Ting Chen, Xuechen Zheng
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23 pages, 12 figures, 3 tables, resubmitted to ApJ after addressing referee's comments
By using a large highly obscured ($N_{\rm H} > 10^{23}\ \rm cm^{-2}$) AGN sample (294 sources at $z \sim 0-5$) selected from detailed X-ray spectral analyses in the deepest Chandra surveys, we explore distributions of these X-ray sources in various optical/IR/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 IRAC color-color diagram fails to identify the majority of X-ray selected highly obscured AGNs, even for the most luminous sources with ${\rm log}\,L_{\rm X}\, \rm (erg\ s^{-1}) > 44$. Over 80% of our sources will not be selected as heavily obscured candidates using the flux ratio of $f_{\rm 24 μm}\, /\,f_R > 1000$ 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 of highly obscured AGNs is similar to that of stellar mass- ($M_*$-) and $z$-controlled normal galaxies, while the lack of quiescent hosts is observed for the former. Partial correlation analyses imply that highly obscured AGN activity (traced by $L_{\rm X}$) appears to be more fundamentally related to $M_*$, and no dependence of $N_{\rm H}$ 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.
Are "Changing-Look" Active Galactic Nuclei Special in the Coevolution of Supermassive Black Holes and their Hosts? II. The Case of Changing-Look Narrow-Line Seyfert 1 Galaxies
National Astronomical Observatories, Chinese Academy of Sciences（中国科学院国家天文台）；Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University（广西大学物理科学与技术学院相对论天体物理广西重点实验室）；School of Astronomy and Space Science, University of Chinese Academy of Sciences（中国科学院大学天文与空间科学学院）；Department of Astronomy, University of California, Berkeley（加州大学伯克利分校天文学系）；Max-Planck-Institut für Radioastronomie（马克斯·普朗克射电天文研究所）
Galaxy and black hole coevolution in dark matter haloes not captured by cosmological simulations
Shanghai Astronomical Observatory, Chinese Academy of Sciences（中国科学院上海天文台）；Kavli Institute for the Physics and Mathematics of the Universe, University of Tokyo（东京大学宇宙物质量子研究科 Kavli 研究所）；Kavli Institute for Astronomy and Astrophysics, Peking University（北京大学天体物理研究所 Kavli 研究所）；International Centre for Radio Astronomy Research, University of Western Australia（西澳大利亚大学国际射电天文研究中心）
A complete catalogue of broad-line AGNs and double-peaked emission lines from MaNGA integral-field spectroscopy of 10K galaxies: stellar population of AGNs, supermassive black holes, and dual AGNs
Hard X-Ray to Radio Multiwavelength SED Analysis of Local U/LIRGs in GOALS Sample with Self-consistent AGN Model Including Polar-dust Component
利用GOALS（Armus et al. 2009）中的核光谱望远镜阵列和/或Swift/Burst Alert望远镜观测到的57个本地发光和超亮红外星系（U/LIRGs），进行了硬X射线-射电多波长光谱能量分布（SED）分解。我们通过实现红外（IR）CLUMPY模型修改了最新的SED拟合程序X-CIGALE，允许自洽地使用X射线环面模型（XCLUMPY）进行多波长研究。采用通过X射线拟合（Yamada et al. 2021）获得的环面参数，我们估计了宿主星系、活动星系核（AGN）环面和极地尘埃的性质。恒星形成率随合并阶段的增加而增大，且大部分在主序以上。SFR与射电光度相关，表明星暴辐射在射电波段占主导地位。虽然极尘消光比环面消光小得多，但极尘的紫外-红外（主要是红外）光度是环面光度的$\sim$ 2倍。极地尘埃的温度降低，而由温度和尘埃升华半径估计的物理尺寸随着活动星系核的光度从几十秒差距（早期合并）到千秒差距尺度（晚期合并）而增加，其中极地尘埃可能是膨胀的（即，不断发展）的尘埃外流。SFR和内禀活动星系核光度的比较表明，星暴发生的第一次和活动星系核出现后，和整体的增长率遵循的同步协同演化关系，可以建立本地星系SMBH质量关系。我们确认共存的强烈的星爆，活动星系核，并在后期的合并大规模外流，支持一个标准的活动星系核反馈方案。
A Rare Eddington-Limited, Heavily Obscured Low-Mass Active Galactic Nucleus Likely Triggered by a Galaxy Merger
Peking University（北京大学）；Kavli Institute for Astronomy and Astrophysics, Peking University（北京大学天文与天体物理前沿科学中心）；Nanjing University（南京大学）；Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education（教育部现代天文与天体物理重点实验室（南京大学））；University of Michigan（密歇根大学）；The Pennsylvania State University（宾夕法尼亚州立大学）；Institute for Gravitation and the Cosmos, The Pennsylvania State University（宾夕法尼亚州立大学引力与宇宙学研究所）
