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

Callingham, J. R.; Bonafede, A.; Bonato, M.; Iacobelli, M.; Schwarz, D. J.; Zheng, J.; Shimwell, T. W.; Kunert-Bajraszewska, M.; Best, P. N.; Lamy, L.; Röttgering, H. J. A.; Haverkorn, M.; O’Sullivan, S. P.; Chyzy, K. T.; Riseley, C. J.; Hoeft, M.; Zarka, P.; Tasse, C.; Shulevski, A.; Botteon, A.; Bruggen, M.; Bloot, S.; Gloudemans, A. J.; Drabent, A.; Gürkan, G.; Morabito, L. K.; Yiu, T. W. H.; Pope, B. J. S.; Hajduk, M.; Bomans, D. J.; Rowlinson, A.; Emig, K. L.; Vedantham, H. K.; White, G. J.; Bassa, C. G.; Kadler, M.; Mingo, B.; Sweijen, F.; van Weeren, R. J.; Timmerman, R.; Pérez-Torres, M.; Hoang, D. N.; Vaccari, M.; Nair, D. G.; Ray, T. P.; Hardcastle, M. J.; Kavanagh, R. D.

doi:10.1051/0004-6361/202245567

000125260 001__ 125260
000125260 005__ 20240705134149.0
000125260 0247_ $$2doi$$a10.1051/0004-6361/202245567
000125260 0248_ $$2sideral$$a133039
000125260 037__ $$aART-2023-133039
000125260 041__ $$aeng
000125260 100__ $$aCallingham, J. R.
000125260 245__ $$aV-LoTSS: The circularly polarised LOFAR Two-metre Sky Survey
000125260 260__ $$c2023
000125260 5060_ $$aAccess copy available to the general public$$fUnrestricted
000125260 5203_ $$aWe 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 deg2). 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.
000125260 536__ $$9info:eu-repo/grantAgreement/EC/H2020/101017536/EU/EOSC Future/EOSC Future$$9This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 101017536-EOSC Future$$9info:eu-repo/grantAgreement/EC/H2020/743029/EU/Ejection Accretion Structures in YSOs (EASY)/EASY$$9This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 743029-EASY$$9info:eu-repo/grantAgreement/EC/H2020/772663/EU/The MAgnetic field in the GALaxy, using Optical Polarization of Stars/MAGALOPS$$9This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 772663-MAGALOPS$$9info:eu-repo/grantAgreement/ES/MICINN/PID2020-117404GB-C21$$9info:eu-repo/grantAgreement/ES/MINECO/SEV-2017-0709
000125260 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000125260 592__ $$a1.896$$b2023
000125260 593__ $$aSpace and Planetary Science$$c2023$$dQ1
000125260 593__ $$aAstronomy and Astrophysics$$c2023$$dQ1
000125260 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000125260 700__ $$aShimwell, T. W.
000125260 700__ $$aVedantham, H. K.
000125260 700__ $$aBassa, C. G.
000125260 700__ $$aO’Sullivan, S. P.
000125260 700__ $$aYiu, T. W. H.
000125260 700__ $$aBloot, S.
000125260 700__ $$aBest, P. N.
000125260 700__ $$aHardcastle, M. J.
000125260 700__ $$aHaverkorn, M.
000125260 700__ $$aKavanagh, R. D.
000125260 700__ $$aLamy, L.
000125260 700__ $$aPope, B. J. S.
000125260 700__ $$aRöttgering, H. J. A.
000125260 700__ $$aSchwarz, D. J.
000125260 700__ $$aTasse, C.
000125260 700__ $$avan Weeren, R. J.
000125260 700__ $$aWhite, G. J.
000125260 700__ $$aZarka, P.
000125260 700__ $$aBomans, D. J.
000125260 700__ $$aBonafede, A.
000125260 700__ $$aBonato, M.
000125260 700__ $$aBotteon, A.
000125260 700__ $$aBruggen, M.
000125260 700__ $$aChyzy, K. T.
000125260 700__ $$aDrabent, A.
000125260 700__ $$aEmig, K. L.
000125260 700__ $$aGloudemans, A. J.
000125260 700__ $$aGürkan, G.
000125260 700__ $$aHajduk, M.
000125260 700__ $$aHoang, D. N.
000125260 700__ $$aHoeft, M.
000125260 700__ $$aIacobelli, M.
000125260 700__ $$aKadler, M.
000125260 700__ $$aKunert-Bajraszewska, M.
000125260 700__ $$aMingo, B.
000125260 700__ $$aMorabito, L. K.
000125260 700__ $$aNair, D. G.
000125260 700__ $$0(orcid)0000-0001-5654-0266$$aPérez-Torres, M.
000125260 700__ $$aRay, T. P.
000125260 700__ $$aRiseley, C. J.
000125260 700__ $$aRowlinson, A.
000125260 700__ $$aShulevski, A.
000125260 700__ $$aSweijen, F.
000125260 700__ $$aTimmerman, R.
000125260 700__ $$aVaccari, M.
000125260 700__ $$aZheng, J.
000125260 773__ $$g670 (2023), A124 [15 pp.]$$pAstron. astrophys.$$tAstronomy and Astrophysics$$x0004-6361
000125260 8564_ $$s6257377$$uhttps://zaguan.unizar.es/record/125260/files/texto_completo.pdf$$yVersión publicada
000125260 8564_ $$s3753331$$uhttps://zaguan.unizar.es/record/125260/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000125260 909CO $$ooai:zaguan.unizar.es:125260$$particulos$$pdriver
000125260 951__ $$a2024-07-05-12:48:03
000125260 980__ $$aARTICLE

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