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dc.contributor.authorPrescott, Matthew
dc.contributor.authorMauch, T.
dc.contributor.authorJarvis, M.J.
dc.contributor.authorMcAlpine, K.
dc.contributor.authorSmith, Daniel
dc.contributor.authorFine, S.
dc.contributor.authorJohnston, R.
dc.contributor.authorHardcastle, M.J.
dc.contributor.authorBaldry, I. K.
dc.contributor.authorBrough, S.
dc.contributor.authorBrown, M. J. I.
dc.contributor.authorBremer, M.N.
dc.contributor.authorDriver, S. P.
dc.contributor.authorHopkins, A. M.
dc.contributor.authorKelvin, L. S.
dc.contributor.authorLoveday, J.
dc.contributor.authorNorberg, P.
dc.contributor.authorObreschkow, D.
dc.contributor.authorSadler, E.M.
dc.date.accessioned2016-03-21T09:35:53Z
dc.date.available2016-03-21T09:35:53Z
dc.date.issued2016-03-21
dc.identifier.citationPrescott , M , Mauch , T , Jarvis , M J , McAlpine , K , Smith , D , Fine , S , Johnston , R , Hardcastle , M J , Baldry , I K , Brough , S , Brown , M J I , Bremer , M N , Driver , S P , Hopkins , A M , Kelvin , L S , Loveday , J , Norberg , P , Obreschkow , D & Sadler , E M 2016 , ' Galaxy And Mass Assembly (GAMA) : The 325-MHz Radio Luminosity Function of AGN and Star Forming Galaxies ' , Monthly Notices of the Royal Astronomical Society , vol. 457 , no. 1 , pp. 730-744 . https://doi.org/10.1093/mnras/stv3020
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 9755346
dc.identifier.otherPURE UUID: 6527dc68-1ede-4674-a245-db8f31843150
dc.identifier.otherArXiv: http://arxiv.org/abs/1601.00003v1
dc.identifier.otherScopus: 84961590559
dc.identifier.otherORCID: /0000-0001-9708-253X/work/69424395
dc.identifier.urihttp://hdl.handle.net/2299/16843
dc.description.abstractMeasurement of the evolution of both active galactic nuclei (AGN) and star-formation in galaxies underpins our understanding of galaxy evolution over cosmic time. Radio continuum observations can provide key information on these two processes, in particular via the mechanical feedback produced by radio jets in AGN, and via an unbiased dust-independent measurement of star-formation rates. In this paper we determine radio luminosity functions at 325 MHz for a sample of AGN and star-forming galaxies by matching a 138 deg sq. radio survey conducted with the Giant Metrewave Radio Telescope (GMRT), with optical imaging and redshifts from the Galaxy And Mass Assembly (GAMA) survey. We find that the radio luminosity function at 325 MHz for star-forming galaxies closely follows that measured at 1.4 GHz. By fitting the AGN radio luminosity function out to $z = 0.5$ as a double power law, and parametrizing the evolution as ${\Phi} \propto (1 + z)^{k}$ , we find evolution parameters of $k = 0.92 \pm 0.95$ assuming pure density evolution and $k = 2.13 \pm 1.96$ assuming pure luminosity evolution. We find that the Low Excitation Radio Galaxies are the dominant population in space density at lower luminosities. Comparing our 325 MHz observations with radio continuum imaging at 1.4 GHz, we determine separate radio luminosity functions for steep and flat-spectrum AGN, and show that the beamed population of flat-spectrum sources in our sample can be shifted in number density and luminosity to coincide with the unbeamed population of steep-spectrum sources, as is expected in the orientation based unification of AGN.en
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.subjectastro-ph.GA
dc.titleGalaxy And Mass Assembly (GAMA) : The 325-MHz Radio Luminosity Function of AGN and Star Forming Galaxiesen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1093/mnras/stv3020
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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