Show simple item record

dc.contributor.authorEck, C. L. Van
dc.contributor.authorHaverkorn, M.
dc.contributor.authorAlves, M. I. R.
dc.contributor.authorBeck, R.
dc.contributor.authorBest, P.
dc.contributor.authorCarretti, E.
dc.contributor.authorChyży, K. T.
dc.contributor.authorFarnes, J. S.
dc.contributor.authorFerrière, K.
dc.contributor.authorHardcastle, M. J.
dc.contributor.authorHeald, G.
dc.contributor.authorHorellou, C.
dc.contributor.authorIacobelli, M.
dc.contributor.authorJelić, V.
dc.contributor.authorMulcahy, D. D.
dc.contributor.authorO'Sullivan, S. P.
dc.contributor.authorPolderman, I. M.
dc.contributor.authorReich, W.
dc.contributor.authorRiseley, C. J.
dc.contributor.authorRöttgering, H.
dc.contributor.authorSchnitzeler, D. H. F. M.
dc.contributor.authorShimwell, T. W.
dc.contributor.authorVacca, V.
dc.contributor.authorVink, J.
dc.contributor.authorWhite, G. J.
dc.date.accessioned2018-07-05T16:03:27Z
dc.date.available2018-07-05T16:03:27Z
dc.date.issued2018-06-01
dc.identifier.citationEck , C L V , Haverkorn , M , Alves , M I R , Beck , R , Best , P , Carretti , E , Chyży , K T , Farnes , J S , Ferrière , K , Hardcastle , M J , Heald , G , Horellou , C , Iacobelli , M , Jelić , V , Mulcahy , D D , O'Sullivan , S P , Polderman , I M , Reich , W , Riseley , C J , Röttgering , H , Schnitzeler , D H F M , Shimwell , T W , Vacca , V , Vink , J & White , G J 2018 , ' Polarized point sources in the LOFAR Two-meter Sky Survey: A preliminary catalog ' , Astronomy & Astrophysics , vol. 613 , A58 . https://doi.org/10.1051/0004-6361/201732228
dc.identifier.issn0004-6361
dc.identifier.otherPURE: 13256005
dc.identifier.otherPURE UUID: 0bf12566-dfea-4ff1-b523-b3d0855730e8
dc.identifier.otherArXiv: http://arxiv.org/abs/1801.04467v1
dc.identifier.otherScopus: 85055142478
dc.identifier.urihttp://hdl.handle.net/2299/20269
dc.description© 2018 ESO 2018. Reproduced with permission from Astronomy & Astrophysics. Content in the UH Research Archive is made available for personal research, educational, and non-commercial purposes only. Unless otherwise stated, all content is protected by copyright, and in the absence of an open license, permissions for further re-use should be sought from the publisher, the author, or other copyright holder.
dc.description.abstractThe polarization properties of radio sources at very low frequencies (<200 MHz) have not been widely measured, but the new generation of low-frequency radio telescopes, including the Low Frequency Array (LOFAR: a Square Kilometre Array Low pathfinder), now gives us the opportunity to investigate these properties. In this paper, we report on the preliminary development of a data reduction pipeline to carry out polarization processing and Faraday tomography for data from the LOFAR Two-meter Sky Survey (LOTSS) and present the results of this pipeline from the LOTSS preliminary data release region (10h45m - 15h30m right ascension, 45 - 57 degrees declination, 570 square degrees). We have produced a catalog of 92 polarized radio sources at 150 MHz at 4.3 arcminute resolution and 1 mJy rms sensitivity, which is the largest catalog of polarized sources at such low frequencies. We estimate a lower limit to the polarized source surface density at 150 MHz, with our resolution and sensitivity, of 1 source per 6.2 square degrees. We find that our Faraday depth measurements are in agreement with previous measurements and have significantly smaller errors. Most of our sources show significant depolarization compared to 1.4 GHz, but there is a small population of sources with low depolarization indicating that their polarized emission is highly localized in Faraday depth. We predict that an extension of this work to the full LOTSS data would detect at least 3400 polarized sources using the same methods, and probably considerably more with improved data processing.en
dc.language.isoeng
dc.relation.ispartofAstronomy & Astrophysics
dc.subjectpolarization
dc.subjectISM: magnetic fields
dc.titlePolarized point sources in the LOFAR Two-meter Sky Survey: A preliminary catalogen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
dc.relation.school
dcterms.dateAccepted2018-06-01
rioxxterms.versionVoR
rioxxterms.versionofrecordhttps://doi.org/10.1051/0004-6361/201732228
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record