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Resolving the Interstellar Medium in Ultraluminous Infrared QSO Hosts with ALMA
Tan,Qing-Hua1; Gao,Yu1; Kohno,Kotaro2,3; Xia,Xiao-Yang4; Omont,Alain5; Hao,Cai-Na4; Mao,Shu-De6,7; Daddi,Emanuele8; Shi,Yong9,10; Zhao,Ying-He11; Cox,Pierre12
2019-12-06
Source PublicationThe Astrophysical Journal
ISSN0004-637X
Volume887Issue:1
AbstractAbstract We present ALMA observations of the CO(1?0) line and 3 mm continuum emission in eight ultraluminous infrared (IR) quasi-stellar objects (QSOs) at z?=?0.06–0.19. All eight IR QSO hosts are clearly resolved in their CO molecular gas emission with a median source size of 3.2 kpc, and seven out of eight sources are detected in 3 mm continuum, which is found to be more centrally concentrated with respect to molecular gas with sizes of 0.4?1.0 kpc. Our observations reveal a diversity of CO morphology and kinematics for the IR QSO systems, which can be roughly classified into three categories: rotating gas disk with ordered velocity gradient, compact CO peak with disturbed velocity, and multiple CO distinct sources undergoing a merger between a luminous QSO and a companion galaxy separated by a few kpc. The molecular gas in three of the IR QSO hosts is found to be rotation-dominated with a ratio of the maximum rotation velocity to the local velocity dispersion of Vrot/σ?=?4–6. Basic estimates of the dynamical masses within the CO-emitting regions give masses between 7.4?×?109 and 6.9?×?1010 M⊙. We find an increasing trend between black hole mass accretion rate and star formation rate (SFR) over 3 orders of magnitude in far-IR luminosity/SFR, in line with the correlation between QSO bolometric luminosity and star formation activity, indicative of a likely direct connection between active galactic nuclei and star formation activity over galaxy evolution timescales.
KeywordStarburst galaxies AGN host galaxies
DOI10.3847/1538-4357/ab50be
Language英语
WOS IDIOP:0004-637X-887-1-ab50be
PublisherThe American Astronomical Society
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/28668
Collection中国科学院国家天文台
Affiliation1.Purple Mountain Observatory & Key Laboratory for Radio Astronomy, Chinese Academy of Sciences, 10 Yuanhua Road, Nanjing 210033, People’s Republic of China; qhtan@pmo.ac.cn, yugao@pmo.ac.cn
2.Institute of Astronomy, Graduate School of Science, The University of Tokyo, Osawa, Mitaka, Tokyo 181-0015, Japan
3.Research Center for the Early Universe, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
4.Tianjin Astrophysics Center, Tianjin Normal University, Tianjin 300387, People’s Republic of China
5.Sorbonne Université, UPMC Université Paris 6 and CNRS, UMR 7095, Institut d’Astrophysique de Paris, 98bis boulevard Arago, F-75014 Paris, France
6.Physics Department and Tsinghua Centre for Astrophysics, Tsinghua University, Beijing, 100084, People’s Republic of China
7.National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Rd., Chaoyang District, Beijing 100012, People’s Republic of China
8.CEA, IRFU, DAp, AIM, Université Paris-Saclay, Universite Paris Diderot, Sorbonne Paris Cité, CNRS, F-91191 Gif-sur-Yvette, France
9.School of Astronomy and Space Science, Nanjing University, Nanjing 210093, People’s Republic of China
10.Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, Nanjing 210093, People’s Republic of China
11.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, People’s Republic of China
12.Institut d’Astrophysique de Paris, CNRS and Universite Pierre et Marie Curie, 98bis boulevard Arago, F-75014 Paris, France
Recommended Citation
GB/T 7714
Tan,Qing-Hua,Gao,Yu,Kohno,Kotaro,et al. Resolving the Interstellar Medium in Ultraluminous Infrared QSO Hosts with ALMA[J]. The Astrophysical Journal,2019,887(1).
APA Tan,Qing-Hua.,Gao,Yu.,Kohno,Kotaro.,Xia,Xiao-Yang.,Omont,Alain.,...&Cox,Pierre.(2019).Resolving the Interstellar Medium in Ultraluminous Infrared QSO Hosts with ALMA.The Astrophysical Journal,887(1).
MLA Tan,Qing-Hua,et al."Resolving the Interstellar Medium in Ultraluminous Infrared QSO Hosts with ALMA".The Astrophysical Journal 887.1(2019).
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