V-LoTSS : the circularly polarised LOFAR Two-metre Sky Survey

2023
journal article
article
5
cris.lastimport.wos2024-04-09T19:20:33Z
dc.abstract.enWe present the detection of 68 sources from the most sensitive radio survey in circular polarisation conducted to date. We used the second data release of the 144 MHz LOFAR Two-metre Sky Survey to produce circularly polarised maps with a median noise of 140 µJy beam$^{-1}$ and resolution of 20'' for ≈27% of the northern sky (5634 deg$^{2}$). The leakage of total intensity into circular polarisation is measured to be ≈0.06%, and our survey is complete at flux densities ≥1 mJy. A detection is considered reliable when the circularly polarised fraction exceeds 1%. We find the population of circularly polarised sources is composed of four distinct classes: stellar systems, pulsars, active galactic nuclei, and sources unidentified in the literature. The stellar systems can be further separated into chromospherically active stars, M dwarfs, and brown dwarfs. Based on the circularly polarised fraction and lack of an optical counterpart, we show it is possible to infer whether the unidentified sources are likely unknown pulsars or brown dwarfs. By the completion of this survey of the northern sky, we expect to detect 300±100 circularly polarised sources.pl
dc.affiliationWydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut – Obserwatorium Astronomicznepl
dc.contributor.authorCallingham, J. R.pl
dc.contributor.authorShimwell, T. W.pl
dc.contributor.authorVedantham, H. K.pl
dc.contributor.authorBassa, C. G.pl
dc.contributor.authorO'Sullivan, S. P.pl
dc.contributor.authorYiu, T. W. H.pl
dc.contributor.authorBloot, S.pl
dc.contributor.authorBest, P. N.pl
dc.contributor.authorHardcastle, M. J.pl
dc.contributor.authorHaverkorn, M.pl
dc.contributor.authorKavanagh, R. D.pl
dc.contributor.authorLamy, L.pl
dc.contributor.authorPope, B. J. S.pl
dc.contributor.authorRöttgering, H. J. A.pl
dc.contributor.authorSchwarz, D. J.pl
dc.contributor.authorTasse, C.pl
dc.contributor.authorvan Weeren, R. J.pl
dc.contributor.authorWhite, G. J.pl
dc.contributor.authorZarka, P.pl
dc.contributor.authorBomans, D. J.pl
dc.contributor.authorBonafede, A.pl
dc.contributor.authorBonato, M.pl
dc.contributor.authorBotteon, A.pl
dc.contributor.authorBruggen, M.pl
dc.contributor.authorChyży, Krzysztof - 100034 pl
dc.contributor.authorDrabent, A.pl
dc.contributor.authorEmig, K. L.pl
dc.contributor.authorGloudemans, A. J.pl
dc.contributor.authorGürkan, G.pl
dc.contributor.authorHajduk, M.pl
dc.contributor.authorHoang, D. N.pl
dc.contributor.authorHoeft, M.pl
dc.contributor.authorIacobelli, M.pl
dc.contributor.authorKadler, M.pl
dc.contributor.authorKunert-Bajraszewska, M.pl
dc.contributor.authorMingo, B.pl
dc.contributor.authorMorabito, L. K.pl
dc.contributor.authorNair, D. G.pl
dc.contributor.authorPérez-Torres, M.pl
dc.contributor.authorRay, T. P.pl
dc.contributor.authorRiseley, C. J.pl
dc.contributor.authorRowlinson, A.pl
dc.contributor.authorShulevski, A.pl
dc.contributor.authorSweijen, F.pl
dc.contributor.authorTimmerman, R.pl
dc.contributor.authorVaccari, M.pl
dc.contributor.authorZheng, J.pl
dc.date.accessioned2023-11-30T15:14:23Z
dc.date.available2023-11-30T15:14:23Z
dc.date.issued2023pl
dc.date.openaccess0
dc.description.accesstimew momencie opublikowania
dc.description.versionostateczna wersja wydawcy
dc.description.volume670pl
dc.identifier.articleidA124pl
dc.identifier.doi10.1051/0004-6361/202245567pl
dc.identifier.eissn1432-0746pl
dc.identifier.issn0004-6361pl
dc.identifier.urihttps://ruj.uj.edu.pl/xmlui/handle/item/323891
dc.languageengpl
dc.language.containerengpl
dc.rightsUdzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa*
dc.rights.licenceCC-BY
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/legalcode.pl*
dc.share.typeotwarte czasopismo
dc.subject.ensurveyspl
dc.subject.encatalogspl
dc.subject.enradio continuum: generalpl
dc.subject.enpolarizationpl
dc.subtypeArticlepl
dc.titleV-LoTSS : the circularly polarised LOFAR Two-metre Sky Surveypl
dc.title.journalAstronomy & Astrophysicspl
dc.typeJournalArticlepl
dspace.entity.typePublication

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