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dc.contributor.authorLenc, Emil
dc.contributor.authorGaensler, B. M.
dc.contributor.authorSun, X. H.
dc.contributor.authorSadler, E. M.
dc.contributor.authorWillis, A. G.
dc.contributor.authorBarry, N.
dc.contributor.authorBeardsley, A. P.
dc.contributor.authorBell, M. E.
dc.contributor.authorBernardi, G.
dc.contributor.authorBowman, J. D.
dc.contributor.authorBriggs, F.
dc.contributor.authorCallingham, J. R.
dc.contributor.authorCappallo, R. J.
dc.contributor.authorCarroll, P.
dc.contributor.authorCorey, B. E.
dc.contributor.authorOliveira-Costa, A. de
dc.contributor.authorDeshpande, A. A.
dc.contributor.authorDillon, J. S.
dc.contributor.authorDwarkanath, K. S.
dc.contributor.authorEmrich, D.
dc.contributor.authorEwall-Wice, A.
dc.contributor.authorFeng, L.
dc.contributor.authorFor, B. -Q.
dc.contributor.authorGoeke, R.
dc.contributor.authorGreenhill, L. J.
dc.contributor.authorHancock, P.
dc.contributor.authorHazelton, B. J.
dc.contributor.authorHewitt, J. N.
dc.contributor.authorHindson, L.
dc.contributor.authorHurley-Walker, N.
dc.contributor.authorJohnston-Hollitt, M.
dc.contributor.authorJacobs, D. C.
dc.contributor.authorKapinska, A. D.
dc.contributor.authorKaplan, D. L.
dc.contributor.authorKasper, J. C.
dc.contributor.authorKim, H. -S.
dc.contributor.authorKratzenberg, E.
dc.contributor.authorLine, J.
dc.contributor.authorLoeb, A.
dc.contributor.authorLonsdale, C. J.
dc.contributor.authorLynch, M. J.
dc.contributor.authorMcKinley, B.
dc.contributor.authorMcWhirter, S. R.
dc.contributor.authorMitchell, D. A.
dc.contributor.authorMorales, M. F.
dc.contributor.authorMorgan, E.
dc.contributor.authorMorgan, J.
dc.contributor.authorMurphy, T.
dc.contributor.authorNeben, A. R.
dc.contributor.authorOberoi, D.
dc.contributor.authorOffringa, A. R.
dc.contributor.authorOrd, S. M.
dc.contributor.authorPaul, S.
dc.contributor.authorPindor, B.
dc.contributor.authorPober, J. C.
dc.contributor.authorPrabu, T.
dc.contributor.authorProcopio, P.
dc.contributor.authorRiding, J.
dc.contributor.authorRogers, A. E. E.
dc.contributor.authorRoshi, A.
dc.contributor.authorShankar, N. Udaya
dc.contributor.authorSethi, S. K.
dc.contributor.authorSrivani, K. S.
dc.contributor.authorStaveley-Smith, L.
dc.contributor.authorSubrahmanyan, R.
dc.contributor.authorSullivan, I. S.
dc.contributor.authorTegmark, M.
dc.contributor.authorThyagarajan, Nithyanandan
dc.contributor.authorTingay, S. J.
dc.contributor.authorTrott, C.
dc.contributor.authorWaterson, M.
dc.contributor.authorWayth, R. B.
dc.contributor.authorWebster, R. L.
dc.contributor.authorWhitney, A. R.
dc.contributor.authorWilliams, A.
dc.contributor.authorWilliams, C. L.
dc.contributor.authorWu, C.
dc.contributor.authorWyithe, J. S. B.
dc.contributor.authorZheng, Q.
dc.date.accessioned2017-02-27T18:28:27Z
dc.date.available2017-02-27T18:28:27Z
dc.date.issued2016-10-10
dc.identifier.citationLenc , E , Gaensler , B M , Sun , X H , Sadler , E M , Willis , A G , Barry , N , Beardsley , A P , Bell , M E , Bernardi , G , Bowman , J D , Briggs , F , Callingham , J R , Cappallo , R J , Carroll , P , Corey , B E , Oliveira-Costa , A D , Deshpande , A A , Dillon , J S , Dwarkanath , K S , Emrich , D , Ewall-Wice , A , Feng , L , For , B -Q , Goeke , R , Greenhill , L J , Hancock , P , Hazelton , B J , Hewitt , J N , Hindson , L , Hurley-Walker , N , Johnston-Hollitt , M , Jacobs , D C , Kapinska , A D , Kaplan , D L , Kasper , J C , Kim , H -S , Kratzenberg , E , Line , J , Loeb , A , Lonsdale , C J , Lynch , M J , McKinley , B , McWhirter , S R , Mitchell , D A , Morales , M F , Morgan , E , Morgan , J , Murphy , T , Neben , A R , Oberoi , D , Offringa , A R , Ord , S M , Paul , S , Pindor , B , Pober , J C , Prabu , T , Procopio , P , Riding , J , Rogers , A E E , Roshi , A , Shankar , N U , Sethi , S K , Srivani , K S , Staveley-Smith , L , Subrahmanyan , R , Sullivan , I S , Tegmark , M , Thyagarajan , N , Tingay , S J , Trott , C , Waterson , M , Wayth , R B , Webster , R L , Whitney , A R , Williams , A , Williams , C L , Wu , C , Wyithe , J S B & Zheng , Q 2016 , ' Low frequency observations of linearly polarized structures in the interstellar medium near the south Galactic pole ' , The Astrophysical Journal , vol. 830 , no. 1 . https://doi.org/10.3847/0004-637X/830/1/38
dc.identifier.issn0004-637X
dc.identifier.otherPURE: 10665054
dc.identifier.otherPURE UUID: 1be564fc-08c1-42f1-b078-25dc4f4fcc1d
dc.identifier.otherArXiv: http://arxiv.org/abs/1607.05779v2
dc.identifier.otherScopus: 84990984030
dc.identifier.urihttp://hdl.handle.net/2299/17653
dc.descriptionThis is an author-created, un-copyedited version of an article published in The Astrophysical Journal. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.3847/0004-637X/830/1/38
dc.description.abstractWe present deep polarimetric observations at 154 MHz with the Murchison Widefield Array (MWA), covering 625 deg^2 centered on RA=0 h, Dec=-27 deg. The sensitivity available in our deep observations allows an in-band, frequency-dependent analysis of polarized structure for the first time at long wavelengths. Our analysis suggests that the polarized structures are dominated by intrinsic emission but may also have a foreground Faraday screen component. At these wavelengths, the compactness of the MWA baseline distribution provides excellent snapshot sensitivity to large-scale structure. The observations are sensitive to diffuse polarized emission at ~54' resolution with a sensitivity of 5.9 mJy beam^-1 and compact polarized sources at ~2.4' resolution with a sensitivity of 2.3 mJy beam^-1 for a subset (400 deg^2) of this field. The sensitivity allows the effect of ionospheric Faraday rotation to be spatially and temporally measured directly from the diffuse polarized background. Our observations reveal large-scale structures (~1 deg - 8 deg in extent) in linear polarization clearly detectable in ~2 minute snapshots, which would remain undetectable by interferometers with minimum baseline lengths >110 m at 154 MHz. The brightness temperature of these structures is on average 4 K in polarized intensity, peaking at 11 K. Rotation measure synthesis reveals that the structures have Faraday depths ranging from -2 rad m^-2 to 10 rad m^-2 with a large fraction peaking at ~+1 rad m^-2. We estimate a distance of 51+/-20 pc to the polarized emission based on measurements of the in-field pulsar J2330-2005. We detect four extragalactic linearly polarized point sources within the field in our compact source survey. Based on the known polarized source population at 1.4 GHz and non-detections at 154 MHz, we estimate an upper limit on the depolarization ratio of 0.08 from 1.4 GHz to 154 MHz.en
dc.format.extent26
dc.language.isoeng
dc.relation.ispartofThe Astrophysical Journal
dc.subjectISM: magnetic fields
dc.subjectISM: structure
dc.subjectISM: polarization
dc.subjectradio continuum
dc.subjectISM: techniques: polarimetric
dc.titleLow frequency observations of linearly polarized structures in the interstellar medium near the south Galactic poleen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
dc.date.embargoedUntil2017-10-10
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.3847/0004-637X/830/1/38
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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