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dc.contributor.authorIvison, R.
dc.contributor.authorSmail, I.
dc.contributor.authorAmblard, A.
dc.contributor.authorArumugam, V.
dc.contributor.authorDe Breuck, C.
dc.contributor.authorEmonts, B.
dc.contributor.authorFeain, I.
dc.contributor.authorGreve, T.
dc.contributor.authorHaas, M.
dc.contributor.authorIbar, E.
dc.contributor.authorJarvis, M.
dc.contributor.authorKovács, A.
dc.contributor.authorLehnert, M.
dc.contributor.authorNesvadba, N.
dc.contributor.authorRöttgering, H.
dc.contributor.authorSeymour, Nick
dc.contributor.authorWylezalek, D.
dc.date.accessioned2017-01-30T15:38:33Z
dc.date.available2017-01-30T15:38:33Z
dc.date.created2016-01-18T20:00:47Z
dc.date.issued2012
dc.identifier.citationIvison, R. and Smail, I. and Amblard, A. and Arumugam, V. and De Breuck, C. and Emonts, B. and Feain, I. et al. 2012. Gas-rich mergers and feedback are ubiquitous amongst starbursting radio galaxies, as revealed by the VLA, IRAM PdBI and Herschel. Monthly Notices of the Royal Astronomical Society. 425 (2): pp. 1320-1331.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/48260
dc.identifier.doi10.1111/j.1365-2966.2012.21544.x
dc.description.abstract

We report new, sensitive observations of two z ∼ 3–3.5 far-infrared-luminous radio galaxies, 6C 1909+72 and B3 J2330+3927, in the 12CO J = 1−0 transition with the Karl Jansky Very Large Array and at 100–500 m using Herschel, alongside new and archival 12CO J = 4−3 observations from the Plateau de Bure Interferometer. We introduce a new colour–colour diagnostic plot to constrain the redshifts of several distant, dusty galaxies in our target fields. A bright SMG near 6C 1909+72 likely shares the same node or filament as the signpost active galactic nuclei (AGN), but it is not detected in 12CO despite ∼20 000 km s−1 of velocity coverage. Also in the 6C 1909+72 field, a large, red dust feature spanning ≈500 kpc is aligned with the radio jet. We suggest several processes by which metal-rich material may have been transported, favouring a collimated outflow reminiscent of the jet-oriented metal enrichment seen in local cluster environments. Our interferometric imaging reveals a gas-rich companion to B3 J2330+3927; indeed, all bar one of the eight z ~> 2 radio galaxies (or companions) detected in 12CO provide some evidence that starburst activity in radio-loud AGN at high redshift is driven by the interaction of two or more gas-rich systems in which a significant mass of stars has already formed, rather than via steady accretion of cold gas from the cosmic web.We find that the 12CO brightness temperature ratios in radio-loud AGN host galaxies are significantly higher than those seen in similarly intense starbursts where AGN activity is less pronounced. Our most extreme example, where , provides evidence that significant energy is being deposited rapidly into the molecular gas via X-rays and/or mechanical (‘quasar-mode’) feedback from the AGN, leading to a high degree of turbulence globally and a low optical depth in 12CO – feedback that may lead to the cessation of star formation on a time-scale commensurate with that of the jet activity, ~<10 Myr.

dc.titleGas-rich mergers and feedback are ubiquitous amongst starbursting radio galaxies, as revealed by the VLA, IRAM PdBI and Herschel
dc.typeJournal Article
dcterms.source.volume425
dcterms.source.number2
dcterms.source.startPage1320
dcterms.source.endPage1331
dcterms.source.issn0035-8711
dcterms.source.titleMonthly Notices of the Royal Astronomical Society
curtin.note

This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2012 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

curtin.departmentDepartment of Physics and Astronomy
curtin.accessStatusOpen access


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