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THE MOST LUMINOUS HEAVILY OBSCURED QUASARS HAVE A HIGH MERGER FRACTION: MORPHOLOGICAL STUDY OF WISE-SELECTED HOT DUST-OBSCURED GALAXIES
Fan, Lulu1; Han YK(韩云坤)2; Fang, Guanwen3; Gao, Ying1; Zhang, Dandan1; Jiang, Xiaoming1; Wu, Qiaoqian1; Yang, Jun1; Li, Zhao1
Source PublicationASTROPHYSICAL JOURNAL LETTERS
2016-05-10
Volume822Issue:2
DOI10.3847/2041-8205/822/2/L32
Contribution Rank第2完成单位
Indexed BySCI
KeywordGalaxies: Active Galaxies: Evolution Galaxies: High-redshift Galaxies: Interactions
Abstract

Previous studies have shown that Wide-field Infrared Survey Explorer-selected hyperluminous, hot dust-obscured galaxies (Hot DOGs) are powered by highly dust-obscured, possibly Compton-thick active galactic nuclei (AGNs). High obscuration provides us a good chance to study the host morphology of the most luminous AGNs directly. We analyze the host morphology of 18 Hot DOGs at z similar to 3 using Hubble Space Telescope/WFC3 imaging. We find that Hot DOGs have a high merger fraction (62 +/- 14%). By fitting the surface brightness profiles, we find that the distribution of Sersic indices in our Hot DOG sample peaks around 2, which suggests that most Hot DOGs have transforming morphologies. We also derive the AGN bolometric luminosity (similar to 10(14) L-circle dot) of our Hot DOG sample by using IR spectral energy distributions decomposition. The derived merger fraction and AGN bolometric luminosity relation is well consistent with the variability-based model prediction. Both the high merger fraction in an IR-luminous AGN sample and relatively low merger fraction in a UV/optical-selected, unobscured AGN sample can be expected in the merger-driven evolutionary model. Finally, we conclude that Hot DOGs are merger-driven and may represent a transit phase during the evolution of massive galaxies, transforming from the dusty starburst-dominated phase to the unobscured QSO phase.

Funding ProjectNational Natural Science Foundation of China (NSFC)[11203023] ; National Natural Science Foundation of China (NSFC)[11303084] ; National Natural Science Foundation of China (NSFC)[11303002] ; National Natural Science Foundation of China (NSFC)[11433005] ; Fundamental Research Funds for the Central Universities[WK3440000001] ; Qilu Young Researcher Project of Shandong University ; Western Light Youth Project ; Yunnan Applied Basic Research Projects[2014FB155]
Funding OrganizationNational Natural Science Foundation of China (NSFC)(11203023, 11303084, 11303002, 11433005) ; Fundamental Research Funds for the Central Universities(WK3440000001) ; Qilu Young Researcher Project of Shandong University ; Western Light Youth Project ; Yunnan Applied Basic Research Projects(2014FB155)
Language英语
Subject Area天文学 ; 星系与宇宙学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN2041-8205
URL查看原文
WOS IDWOS:000376173300012
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordSUPERMASSIVE BLACK-HOLES ; SIMILAR-TO 2 ; ACTIVE GALACTIC NUCLEUS ; HOST GALAXIES ; STAR-FORMATION ; MAJOR MERGERS ; FOLLOW-UP ; AGN ; CANDELS ; CONNECTION
Citation statistics
Cited Times:29[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9600
Collection大样本恒星演化研究组
Corresponding AuthorFan, Lulu; Han YK(韩云坤)
Affiliation1.Shandong Provincial Key Lab of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Science, Shandong University, Weihai 264209, China
2.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
3.Institute for Astronomy and History of Science and Technology, Dali University, Dali 671003, China
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Fan, Lulu,Han YK,Fang, Guanwen,et al. THE MOST LUMINOUS HEAVILY OBSCURED QUASARS HAVE A HIGH MERGER FRACTION: MORPHOLOGICAL STUDY OF WISE-SELECTED HOT DUST-OBSCURED GALAXIES[J]. ASTROPHYSICAL JOURNAL LETTERS,2016,822(2).
APA Fan, Lulu.,Han YK.,Fang, Guanwen.,Gao, Ying.,Zhang, Dandan.,...&Li, Zhao.(2016).THE MOST LUMINOUS HEAVILY OBSCURED QUASARS HAVE A HIGH MERGER FRACTION: MORPHOLOGICAL STUDY OF WISE-SELECTED HOT DUST-OBSCURED GALAXIES.ASTROPHYSICAL JOURNAL LETTERS,822(2).
MLA Fan, Lulu,et al."THE MOST LUMINOUS HEAVILY OBSCURED QUASARS HAVE A HIGH MERGER FRACTION: MORPHOLOGICAL STUDY OF WISE-SELECTED HOT DUST-OBSCURED GALAXIES".ASTROPHYSICAL JOURNAL LETTERS 822.2(2016).
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