Revealing the Faraday depth structure of radio galaxy NGC612 with broad-band radio polarimetric observations

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dc.contributor.authorKaczmarek, Jane F
dc.contributor.authorPurcell, C R
dc.contributor.authorGaensler, B M
dc.contributor.authorSun, X. H.
dc.contributor.authorO'Sullivan, S P
dc.contributor.authorMcClure-Griffiths, Naomi
dc.date.accessioned2021-11-30T03:26:56Z
dc.date.available2021-11-30T03:26:56Z
dc.date.issued2018
dc.date.updated2020-11-23T11:52:57Z
dc.description.abstractWe present full-polarization, broad-band observations of the radio galaxy NGC 612 (PKS B0131-637) from 1.3 to 3.1 GHz using the Australia Telescope Compact Array. The relatively large angular scale of the radio galaxy makes it a good candidate with which to investigate the polarization mechanisms responsible for the observed Faraday depth structure. By fitting complex polarization models to the polarized spectrum of each pixel, we find that a single polarization component can adequately describe the observed signal for the majority of the radio galaxy. While we cannot definitively rule out internal Faraday rotation, we argue that the bulk of the Faraday rotation is taking place in a thin skin that girts the polarized emission. Using minimum energy estimates, we find an implied total magnetic field strength of 4.2 µG.en_AU
dc.description.sponsorshipThe Australia Telescope Compact Array is part of the Australia Telescope National Facility that is funded by the Australian Government for operation as a National Facility managed by CSIRO. We thank the staff at the Australia Telescope Compact array for their assistance and support with this project. We also appreciate the invaluable insight offered to us by R. W. Hunstead, R. A. Laing, and L. Rudnick. B.M.G. and C.R.P acknowledge the support of the Australian Research Council through grant no. FL100100114. The Dunlap Institute is funded through an endowment established by the David Dunlap family and the University of Toronto. N.M.M.-G. acknowledges the support of the Australian Research Council through Future Fellowship FT150100024. X.H.S. is supported by the National Natural Science Foundation of China under grant no. 11763008.en_AU
dc.format.mimetypeapplication/pdfen_AU
dc.identifier.issn0035-8711en_AU
dc.identifier.urihttp://hdl.handle.net/1885/252018
dc.language.isoen_AUen_AU
dc.provenancehttps://v2.sherpa.ac.uk/id/publication/24618..."published version can be made open access in institutional repository" from SHERPA/RoMEO site (as at 30/11/21).en_AU
dc.publisherBlackwell Publishing Ltden_AU
dc.relationhttp://purl.org/au-research/grants/arc/FL100100114en_AU
dc.relationhttp://purl.org/au-research/grants/arc/FT150100024en_AU
dc.rights© 2018 The Author(s)en_AU
dc.sourceMonthly Notices of the Royal Astronomical Societyen_AU
dc.subjecttechniques: polarimetricen_AU
dc.subjectgalaxies: individual: NGC 612en_AU
dc.subjectgalaxies: magnetic fieldsen_AU
dc.subjectradio continuum: galaxiesen_AU
dc.titleRevealing the Faraday depth structure of radio galaxy NGC612 with broad-band radio polarimetric observationsen_AU
dc.typeJournal articleen_AU
dcterms.accessRightsOpen Accessen_AU
dcterms.dateAccepted2018-01-22
local.bibliographicCitation.issue2en_AU
local.bibliographicCitation.lastpage1613en_AU
local.bibliographicCitation.startpage1596en_AU
local.contributor.affiliationKaczmarek, Jane F, Sydney Institute for Astronomy, University of Sydneyen_AU
local.contributor.affiliationPurcell, C R, Sydney Institute for Astronomy, University of Sydneyen_AU
local.contributor.affiliationGaensler, B M, University of Sydneyen_AU
local.contributor.affiliationSun, X. H., University of Sydneyen_AU
local.contributor.affiliationO'Sullivan, S P, University of Hamburgen_AU
local.contributor.affiliationMcClure-Griffiths, Naomi, College of Science, ANUen_AU
local.contributor.authoremailu1000518@anu.edu.auen_AU
local.contributor.authoruidMcClure-Griffiths, Naomi, u1000518en_AU
local.description.notesImported from ARIESen_AU
local.identifier.absfor020103 - Cosmology and Extragalactic Astronomyen_AU
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciencesen_AU
local.identifier.ariespublicationu4485658xPUB192en_AU
local.identifier.citationvolume476en_AU
local.identifier.doi10.1093/MNRAS/STY269en_AU
local.identifier.scopusID2-s2.0-85052108688
local.identifier.uidSubmittedByu4485658en_AU
local.publisher.urlhttp://mnras.oxfordjournals.org/en_AU
local.type.statusPublished Versionen_AU

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