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dc.contributor.authorGurkan, Gulay
dc.contributor.authorHardcastle, Martin J.
dc.contributor.authorSmith, Daniel
dc.contributor.authorBest, Philip N.
dc.contributor.authorBourne, Nathan
dc.contributor.authorCalistro-Rivera, Gabriela
dc.contributor.authorHeald, George
dc.contributor.authorJarvis, Matt J.
dc.contributor.authorPrandoni, Isabella
dc.contributor.authorRottgering, Huub J. A.
dc.contributor.authorSabater, Jose
dc.contributor.authorShimwell, Tim
dc.contributor.authorTasse, Cyril
dc.contributor.authorWilliams, Wendy L.
dc.date.accessioned2018-07-05T16:03:18Z
dc.date.available2018-07-05T16:03:18Z
dc.date.issued2018-04-11
dc.identifier.citationGurkan , G , Hardcastle , M J , Smith , D , Best , P N , Bourne , N , Calistro-Rivera , G , Heald , G , Jarvis , M J , Prandoni , I , Rottgering , H J A , Sabater , J , Shimwell , T , Tasse , C & Williams , W L 2018 , ' LOFAR/H-ATLAS: The low-frequency radio luminosity - star-formation rate relation ' , Monthly Notices of the Royal Astronomical Society , vol. 475 , no. 3 , sty016 , pp. 3010-3028 . https://doi.org/10.1093/mnras/sty016
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 13180253
dc.identifier.otherPURE UUID: a9f28b26-3f46-4965-a814-96c8e89558b0
dc.identifier.otherArXiv: http://arxiv.org/abs/1801.02629v1
dc.identifier.urihttp://hdl.handle.net/2299/20267
dc.descriptionThis article has been accepted for publication in Monthly Notices of the Royal Astronomical Society. © 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society.
dc.description.abstractRadio emission is a key indicator of star-formation activity in galaxies, but the radio luminosity-star formation relation has to date been studied almost exclusively at frequencies of 1.4 GHz or above. At lower radio frequencies the effects of thermal radio emission are greatly reduced, and so we would expect the radio emission observed to be completely dominated by synchrotron radiation from supernova-generated cosmic rays. As part of the LOFAR Surveys Key Science project, the Herschel-ATLAS NGP field has been surveyed with LOFAR at an effective frequency of 150 MHz. We select a sample from the MPA-JHU catalogue of SDSS galaxies in this area: the combination of Herschel, optical and mid-infrared data enable us to derive star-formation rates (SFRs) for our sources using spectral energy distribution fitting, allowing a detailed study of the low-frequency radio luminosity--star-formation relation in the nearby Universe. For those objects selected as star-forming galaxies (SFGs) using optical emission line diagnostics, we find a tight relationship between the 150 MHz radio luminosity ($L_{150}$) and SFR. Interestingly, we find that a single power-law relationship between $L_{150}$ and SFR is not a good description of all SFGs: a broken power law model provides a better fit. This may indicate an additional mechanism for the generation of radio-emitting cosmic rays. Also, at given SFR, the radio luminosity depends on the stellar mass of the galaxy. Objects which were not classified as SFGs have higher 150-MHz radio luminosity than would be expected given their SFR, implying an important role for low-level active galactic nucleus activity.en
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.rightsOpen
dc.subjectgalaxies: nuclei
dc.subjectinfrared: galaxies
dc.subjectradio continuum: galaxies
dc.titleLOFAR/H-ATLAS: The low-frequency radio luminosity - star-formation rate relationen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dc.description.versiontypeFinal Published version
dcterms.dateAccepted2018-04-11
rioxxterms.versionAM
rioxxterms.versionVoR
rioxxterms.versionofrecordhttps://doi.org/10.1093/mnras/sty016
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


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