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dc.contributor.authorHeywood, I.
dc.contributor.authorContreras, Y.
dc.contributor.authorSmith, D. J. B.
dc.contributor.authorCooray, A.
dc.contributor.authorDunne, L.
dc.contributor.authorGomez, L.
dc.contributor.authorIbar, E.
dc.contributor.authorIvison, R. J.
dc.contributor.authorJarvis, M. J.
dc.contributor.authorMichalowski, M. J.
dc.contributor.authorRiechers, D. A.
dc.contributor.authorWerf, P. van der
dc.date.accessioned2017-05-25T11:29:59Z
dc.date.available2017-05-25T11:29:59Z
dc.date.issued2016-10-27
dc.identifier.citationHeywood , I , Contreras , Y , Smith , D J B , Cooray , A , Dunne , L , Gomez , L , Ibar , E , Ivison , R J , Jarvis , M J , Michalowski , M J , Riechers , D A & Werf , P V D 2016 , ' ATCA detections of massive molecular gas reservoirs in dusty, high-z radio galaxies ' , Monthly Notices of the Royal Astronomical Society , vol. 462 , no. 2 , pp. 1297-1307 . https://doi.org/10.1093/mnras/stw2774
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 10611645
dc.identifier.otherPURE UUID: 3877d91d-f832-49d2-97be-c39e692080cf
dc.identifier.otherArXiv: http://arxiv.org/abs/1610.07699v2
dc.identifier.otherORCID: /0000-0001-9708-253X/work/69424302
dc.identifier.otherScopus: 85021362140
dc.identifier.urihttp://hdl.handle.net/2299/18218
dc.descriptionThis is an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. © 2016 The Authors. First published online October 27, 2016, available online at doi: 10.1093/mnras/stw2774. Published by Oxford University Press on behalf of the Royal Astronomical Society.
dc.description.abstractObservations using the 7 mm receiver system on the Australia Telescope Compact Array have revealed large reservoirs of molecular gas in two high-redshift radio galaxies: HATLAS J090426.9+015448 (z = 2.37) and HATLAS J140930.4+003803 (z = 2.04). Optically the targets are very faint, and spectroscopy classifies them as narrow-line radio galaxies. In addition to harbouring an active galactic nucleus the targets share many characteristics of sub-mm galaxies. Far-infrared data from Herschel-ATLAS suggest high levels of dust (>10^9 M_solar) and a correspondingly large amount of obscured star formation (~1000 M_solar / yr). The molecular gas is traced via the J = 1-0 transition of 12CO, its luminosity implying total H_2 masses of (1.7 +/- 0.3) x 10^11 and (9.5 +/- 2.4) x 10^10 (alpha_CO/0.8) M_solar in HATLAS J090426.9+015448 and HATLAS J140930.4+003803 respectively. Both galaxies exhibit molecular line emission over a broad (~1000 km/s) velocity range, and feature double-peaked profiles. We interpret this as evidence of either a large rotating disk or an on-going merger. Gas depletion timescales are ~100 Myr. The 1.4 GHz radio luminosities of our targets place them close to the break in the luminosity function. As such they represent `typical' z > 2 radio sources, responsible for the bulk of the energy emitted at radio wavelengths from accretion-powered sources at high redshift, and yet they rank amongst the most massive systems in terms of molecular gas and dust content. We also detect 115 GHz rest-frame continuum emission, indicating a very steep high-radio-frequency spectrum, possibly classifying the targets as compact steep spectrum objects.en
dc.format.extent10
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.rightsOpen
dc.subjectastro-ph.GA
dc.subjectastro-ph.CO
dc.titleATCA detections of massive molecular gas reservoirs in dusty, high-z radio galaxiesen
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
dc.description.versiontypeFinal Published version
dcterms.dateAccepted2016-10-27
rioxxterms.versionVoR
rioxxterms.versionofrecordhttps://doi.org/10.1093/mnras/stw2774
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


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