Show simple item record

dc.contributor.authorO'Sullivan, S. P.
dc.contributor.authorMachalski, J.
dc.contributor.authorEck, C. L. Van
dc.contributor.authorHeald, G.
dc.contributor.authorBrueggen, M.
dc.contributor.authorFynbo, J. P. U.
dc.contributor.authorHeintz, K. E.
dc.contributor.authorLara-Lopez, M. A.
dc.contributor.authorVacca, V.
dc.contributor.authorHardcastle, M. J.
dc.contributor.authorShimwell, T. W.
dc.contributor.authorTasse, C.
dc.contributor.authorVazza, F.
dc.contributor.authorAndernach, H.
dc.contributor.authorBirkinshaw, M.
dc.contributor.authorHaverkorn, M.
dc.contributor.authorHorellou, C.
dc.contributor.authorWilliams, W. L.
dc.contributor.authorHarwood, J. J.
dc.contributor.authorBrunetti, G.
dc.contributor.authorAnderson, J. M.
dc.contributor.authorMao, S. A.
dc.contributor.authorNikiel-Wroczynski, B.
dc.contributor.authorTakahashi, K.
dc.contributor.authorCarretti, E.
dc.contributor.authorVernstrom, T.
dc.contributor.authorWeeren, R. J. van
dc.contributor.authorOrru, E.
dc.contributor.authorMorabito, L. K.
dc.contributor.authorCallingham, J. R.
dc.date.accessioned2019-01-17T16:00:17Z
dc.date.available2019-01-17T16:00:17Z
dc.date.issued2018-10-09
dc.identifier.citationO'Sullivan , S P , Machalski , J , Eck , C L V , Heald , G , Brueggen , M , Fynbo , J P U , Heintz , K E , Lara-Lopez , M A , Vacca , V , Hardcastle , M J , Shimwell , T W , Tasse , C , Vazza , F , Andernach , H , Birkinshaw , M , Haverkorn , M , Horellou , C , Williams , W L , Harwood , J J , Brunetti , G , Anderson , J M , Mao , S A , Nikiel-Wroczynski , B , Takahashi , K , Carretti , E , Vernstrom , T , Weeren , R J V , Orru , E , Morabito , L K & Callingham , J R 2018 , ' The intergalactic magnetic field probed by a giant radio galaxy ' , Astronomy & Astrophysics . https://doi.org/10.1051/0004-6361/201833832
dc.identifier.issn0004-6361
dc.identifier.otherPURE: 15712694
dc.identifier.otherPURE UUID: 6f187b20-4f55-4b46-8b7f-d7c6f3f5c4bd
dc.identifier.otherArXiv: http://arxiv.org/abs/1811.07934v1
dc.identifier.otherScopus: 85062035791
dc.identifier.urihttp://hdl.handle.net/2299/20986
dc.description12 pages, 6 figures, 3 tables. This paper is part of the LOFAR surveys data release 1 and has been accepted for publication in a special edition of A&A that will appear in Feb 2019, volume 622. The catalogues and images from the data release will be publicly available on lofar-surveys.org upon publication of the journal. Reproduced with permission from Astronomy & Astrophysics. © 2018 ESO
dc.description.abstractCosmological simulations predict that an intergalactic magnetic field (IGMF) pervades the large scale structure (LSS) of the Universe. Measuring the IGMF is important to determine its origin (i.e. primordial or otherwise). Using data from the LOFAR Two Metre Sky Survey (LoTSS), we present the Faraday rotation measure (RM) and depolarisation properties of the giant radio galaxy J1235+5317, at a redshift of $z = 0.34$ and 3.38 Mpc in size. We find a mean RM difference between the lobes of $2.5\pm0.1$ rad/m$^2$ , in addition to small scale RM variations of ~0.1 rad/m$^2$ . From a catalogue of LSS filaments based on optical spectroscopic observations in the local universe, we find an excess of filaments intersecting the line of sight to only one of the lobes. Associating the entire RM difference to these LSS filaments leads to a gas density-weighted IGMF strength of ~0.3 {\mu}G. However, direct comparison with cosmological simulations of the RM contribution from LSS filaments gives a low probability (~5%) for an RM contribution as large as 2.5 rad/m$^2$ , for the case of IGMF strengths of 10 to 50 nG. It is likely that variations in the RM from the Milky Way (on 11' scales) contribute significantly to the mean RM difference, and a denser RM grid is required to better constrain this contribution. In general, this work demonstrates the potential of the LOFAR telescope to probe the weak signature of the IGMF. Future studies, with thousands of sources with high accuracy RMs from LoTSS, will enable more stringent constraints on the nature of the IGMF.en
dc.language.isoeng
dc.relation.ispartofAstronomy & Astrophysics
dc.rights/dk/atira/pure/core/openaccesspermission/open
dc.subjectastro-ph.HE
dc.subjectastro-ph.CO
dc.subjectastro-ph.GA
dc.titleThe intergalactic magnetic field probed by a giant radio galaxyen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dc.description.versiontypeFinal Accepted Version
dcterms.dateAccepted2018-10-09
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1051/0004-6361/201833832
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeopenAccess


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record