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SCUBA-2 web survey: I. Observations of CO(3–2) in hyper-luminous QSO fields

Hill, Ryley and Chapman, Scott C. and Scott, Douglas and Smail, Ian and Steidel, Charles C. and Krips, Melanie and Babul, Arif and Berg, Trystyn and Bertoldi, Frank and Gao, Yu and Lacaille, Kevin and Matsuda, Yuichi and Ross, Colin and Rudie, Gwen and Trainor, Ryan (2019) SCUBA-2 web survey: I. Observations of CO(3–2) in hyper-luminous QSO fields. Monthly Notices of the Royal Astronomical Society, 485 (1). pp. 753-769. ISSN 0035-8711.

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A primary goal of the Submillimetre Common User Bolometer Array-2 web survey is to perform tomography of the early intergalactic medium by studying systems containing some of the brightest quasi-stellar objects (QSOs; 2.5 < z < 3.0) and nearby submillimetre galaxies (SMGs). As a first step, this paper aims to characterize the galaxies that host the QSOs. To achieve this, a sample of 13 hyper-luminous (⁠L_(AGN) > 10^(14) L⊙) QSOs with previous submillimetre continuum detections were followed up with CO(3–2) observations using the NOrthern Extended Millimeter Array interferometer. All but two of the QSOs are detected in CO(3–2); for one non-detection, our observations show a tentative 2σ line at the expected position and redshift, and for the other non-detection we find only continuum flux density an order of magnitude brighter than the other sources. In three of the fields, a companion potentially suitable for tomography is detected in CO line emission within 25 arcsec of the QSO. We derive gas masses, dynamical masses, and far-infrared luminosities, and show that the QSOs in our sample have similar properties compared to less luminous QSOs and SMGs in the literature, despite the fact that their black hole masses (which are proportional to L_(AGN)) are 1–2 orders of magnitude larger. We discuss two interpretations of these observations: this is due to selection effects, such as preferential face-on viewing angles and picking out objects in the tail ends of the scatter in host-galaxy mass and black hole mass relationships; or the black hole masses have been overestimated because the accretion rates are super-Eddington.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Scott, Douglas0000-0002-6878-9840
Smail, Ian0000-0003-3037-257X
Steidel, Charles C.0000-0002-4834-7260
Babul, Arif0000-0003-1746-9529
Berg, Trystyn0000-0002-2606-5078
Bertoldi, Frank0000-0002-1707-1775
Gao, Yu0000-0003-0007-2197
Lacaille, Kevin0000-0001-9870-5663
Rudie, Gwen0000-0002-8459-5413
Trainor, Ryan0000-0002-6967-7322
Additional Information:© 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model ( Accepted 2019 February 5. Received 2018 December 31; in original form 2018 October 24. Published: 13 February 2019. The authors would like to thank Christine Done, Stuart McAlpine, and Chris Willott for their helpful discussions. This work is based on observations carried out under project number S17BS with the Institut de Radioastronomie Millimétrique (IRAM) NOEMA Interferometer. IRAM is supported by the Institut National des Sciences de l'Univers/Centre National de la Recherche Scientifique (INSU/CNRS, France), the Max Planck Gesellschaft (MPG, Germany), and the Instituto Geográfico Nacional (IGN, Spain). The James Clerk Maxwell Telescope is operated by the East Asian Observatory on behalf of The National Astronomical Observatory of Japan; Academia Sinica Institute of Astronomy and Astrophysics; the Korea Astronomy and Space Science Institute; the Operation, Maintenance and Upgrading Fund for Astronomical Telescopes and Facility Instruments, budgeted from the Ministry of Finance (MOF) of China and administrated by the Chinese Academy of Sciences (CAS), as well as the National Key R&D Program of China (No. 2017YFA0402700). Additional funding support is provided by the Science and Technology Facilities Council of the United Kingdom and participating universities in the United Kingdom and Canada. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. This work was supported by the Natural Sciences and Engineering Research Council of Canada. Ian Smail acknowledges the European Research Council Advanced Investigator programme DUSTYGAL 321334 and the Science and Technology Facilities Council grant ST/P000541/1. This work is based in part on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with the National Aeronautics and Space Administration (NASA). Yuichi Matsuda acknowledges Japan Society for the Promotion of Science (JSPS) KAKENHI grants 17H04831 and 17KK0098. This paper includes data gathered with the 6.5 m Magellan Telescopes located at Las Campanas Observatory, Chile.
Errata:The version originally published online and in print contained an error in the title. In the online version the term ‘field’ has been corrected to ‘fields’. The publisher apologises for this error.
Group:Astronomy Department
Funding AgencyGrant Number
Institut de Radioastronomie Millimétrique (IRAM)S17BS
Institut national des sciences de l'Univers (INSU)UNSPECIFIED
Centre National de la Recherche Scientifique (CNRS)UNSPECIFIED
Max Planck GesellschaftUNSPECIFIED
Instituto Geográfico Nacional (IGN)UNSPECIFIED
National Key Research and Development Program of China2017YFA0402700
Science and Technology Facilities Council (STFC)ST/P000541/1
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
European Research Council (ERC)321334
Japan Society for the Promotion of Science (JSPS)17H04831
Japan Society for the Promotion of Science (JSPS)17KK0098
Subject Keywords:galaxies: active – quasars: emission lines – submillimetre: galaxies
Issue or Number:1
Record Number:CaltechAUTHORS:20190523-111840539
Persistent URL:
Official Citation:Ryley Hill, Scott C Chapman, Douglas Scott, Ian Smail, Charles C Steidel, Melanie Krips, Arif Babul, Trystyn Berg, Frank Bertoldi, Yu Gao, Kevin Lacaille, Yuichi Matsuda, Colin Ross, Gwen Rudie, Ryan Trainor, The SCUBA-2 web survey: I. Observations of CO(3–2) in hyper-luminous QSO fields, Monthly Notices of the Royal Astronomical Society, Volume 485, Issue 1, May 2019, Pages 753–769,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:95736
Deposited By: Tony Diaz
Deposited On:23 May 2019 18:34
Last Modified:12 Dec 2020 00:41

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