The GLEAM 4-Jy (G4Jy) Sample: II. Host Galaxy Identification for Individual Sources

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aut.relation.journalPublications of the Astronomical Society of Australiaen_NZ
aut.researcherWeston, Stuart
dc.contributor.authorWhite, SVen_NZ
dc.contributor.authorFranzen, TMOen_NZ
dc.contributor.authorRiseley, CJen_NZ
dc.contributor.authorIvy Wong, Oen_NZ
dc.contributor.authorKapińska, ADen_NZ
dc.contributor.authorHurley-Walker, Nen_NZ
dc.contributor.authorCallingham, JRen_NZ
dc.contributor.authorThorat, Ken_NZ
dc.contributor.authorWu, Cen_NZ
dc.contributor.authorHancock, Pen_NZ
dc.contributor.authorHunstead, RWen_NZ
dc.contributor.authorSeymour, Nen_NZ
dc.contributor.authorSwan, Jen_NZ
dc.contributor.authorWayth, Ren_NZ
dc.contributor.authorMorgan, Jen_NZ
dc.contributor.authorChhetri, Ren_NZ
dc.contributor.authorJackson, Cen_NZ
dc.contributor.authorWeston, Sen_NZ
dc.contributor.authorBell, Men_NZ
dc.contributor.authorGaensler, BMen_NZ
dc.contributor.authorJohnston-Hollitt, Men_NZ
dc.contributor.authorOffringa, Aen_NZ
dc.contributor.authorStaveley-Smith, Len_NZ
dc.date.accessioned2020-08-07T00:07:45Z
dc.date.available2020-08-07T00:07:45Z
dc.date.copyright2020-01-01en_NZ
dc.date.issued2020-01-01en_NZ
dc.description.abstractThe entire southern sky (Declination, d < 30°) has been observed using the Murchison Widefield Array (MWA), which provides radio imaging of ~2 arcmin resolution at low frequencies (72 231 MHz). This is the GaLactic and Extragalactic All-sky MWA (GLEAM) Survey, and we have previously used a combination of visual inspection, cross-checks against the literature, and internal matching to identify the 'brightest' radio-sources (S151 MHz > 4 Jy) in the extragalactic catalogue (Galactic latitude, |b| > 10°). We refer to these 1 863 sources as the GLEAM 4-Jy (G4Jy) Sample, and use radio images (of =45 arcsec resolution), and multi-wavelength information, to assess their morphology and identify the galaxy that is hosting the radio emission (where appropriate). Details of how to access all of the overlays used for this work are available at https://github.com/svw26/G4Jy. Alongside this we conduct further checks against the literature, which we document here for individual sources. Whilst the vast majority of the G4Jy Sample are active galactic nuclei with powerful radio-jets, we highlight that it also contains a nebula, two nearby, star-forming galaxies, a cluster relic, and a cluster halo. There are also three extended sources for which we are unable to infer the mechanism that gives rise to the low-frequency emission. In the G4Jy catalogue we provide mid-infrared identifications for 86% of the sources, and flag the remainder as: having an uncertain identification (129 sources), having a faint/uncharacterised midinfrared host (126 sources), or it being inappropriate to specify a host (2 sources). For the subset of 129 sources, there is ambiguity concerning candidate host-galaxies, and this includes four sources (B0424 728, B0703 451, 3C 198, and 3C 403.1) where we question the existing identification.en_NZ
dc.identifier.citationPublications of the Astronomical Society of Australia 37, e017, 1–30. https://doi.org/10.1017/pasa.2020.10
dc.identifier.doi10.1017/pasa.2020.10en_NZ
dc.identifier.issn1323-3580en_NZ
dc.identifier.issn1448-6083en_NZ
dc.identifier.urihttps://hdl.handle.net/10292/13584
dc.publisherCambridge University Press
dc.relation.urihttps://www.cambridge.org/core/journals/publications-of-the-astronomical-society-of-australia/article/gleam-4jy-g4jy-sample-ii-host-galaxy-identification-for-individual-sources/52BADD8D022C7FEBEF5315F74603B3DE
dc.rightsThis article has been published in a revised form in [Publications of the Astronomical Society of Australia] [http://doi.org/10.1017/pasa.2020.10]. This version is free to view and download for private research and study only. Not for re-distribution or re-use. © Astronomical Society of Australia 2020.
dc.rights.accessrightsOpenAccessen_NZ
dc.subjectCatalogues; Galaxies: active; Galaxies: evolution; Radio continuum: galaxies
dc.titleThe GLEAM 4-Jy (G4Jy) Sample: II. Host Galaxy Identification for Individual Sourcesen_NZ
dc.typeJournal Article
pubs.elements-id374356
pubs.organisational-data/AUT
pubs.organisational-data/AUT/Design & Creative Technologies
pubs.organisational-data/AUT/Design & Creative Technologies/Engineering, Computer & Mathematical Sciences
pubs.organisational-data/AUT/Design & Creative Technologies/Engineering, Computer & Mathematical Sciences/ISASR
pubs.organisational-data/AUT/PBRF
pubs.organisational-data/AUT/PBRF/PBRF Design and Creative Technologies
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