dc.contributor.author | Heywood, I. | |
dc.contributor.author | Contreras, Y. | |
dc.contributor.author | Smith, D. J. B. | |
dc.contributor.author | Cooray, A. | |
dc.contributor.author | Dunne, L. | |
dc.contributor.author | Gomez, L. | |
dc.contributor.author | Ibar, E. | |
dc.contributor.author | Ivison, R. J. | |
dc.contributor.author | Jarvis, M. J. | |
dc.contributor.author | Michalowski, M. J. | |
dc.contributor.author | Riechers, D. A. | |
dc.contributor.author | Werf, P. van der | |
dc.date.accessioned | 2017-05-25T11:29:59Z | |
dc.date.available | 2017-05-25T11:29:59Z | |
dc.date.issued | 2016-10-27 | |
dc.identifier.citation | Heywood , 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.issn | 0035-8711 | |
dc.identifier.other | ArXiv: http://arxiv.org/abs/1610.07699v2 | |
dc.identifier.other | ORCID: /0000-0001-9708-253X/work/69424302 | |
dc.identifier.uri | http://hdl.handle.net/2299/18218 | |
dc.description | This 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.abstract | Observations 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.extent | 10 | |
dc.format.extent | 1162957 | |
dc.language.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | |
dc.subject | astro-ph.GA | |
dc.subject | astro-ph.CO | |
dc.title | ATCA detections of massive molecular gas reservoirs in dusty, high-z radio galaxies | en |
dc.contributor.institution | Centre for Astrophysics Research (CAR) | |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.description.status | Peer reviewed | |
rioxxterms.versionofrecord | 10.1093/mnras/stw2774 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |