dc.contributor.author O'Sullivan, S. P. dc.contributor.author Machalski, J. dc.contributor.author Eck, C. L. Van dc.contributor.author Heald, G. dc.contributor.author Brueggen, M. dc.contributor.author Fynbo, J. P. U. dc.contributor.author Heintz, K. E. dc.contributor.author Lara-Lopez, M. A. dc.contributor.author Vacca, V. dc.contributor.author Hardcastle, M. J. dc.contributor.author Shimwell, T. W. dc.contributor.author Tasse, C. dc.contributor.author Vazza, F. dc.contributor.author Andernach, H. dc.contributor.author Birkinshaw, M. dc.contributor.author Haverkorn, M. dc.contributor.author Horellou, C. dc.contributor.author Williams, W. L. dc.contributor.author Harwood, J. J. dc.contributor.author Brunetti, G. dc.contributor.author Anderson, J. M. dc.contributor.author Mao, S. A. dc.contributor.author Nikiel-Wroczynski, B. dc.contributor.author Takahashi, K. dc.contributor.author Carretti, E. dc.contributor.author Vernstrom, T. dc.contributor.author Weeren, R. J. van dc.contributor.author Orru, E. dc.contributor.author Morabito, L. K. dc.contributor.author Callingham, J. R. dc.date.accessioned 2019-01-17T16:00:17Z dc.date.available 2019-01-17T16:00:17Z dc.date.issued 2018-10-09 dc.identifier.citation O'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.issn 0004-6361 dc.identifier.other PURE: 15712694 dc.identifier.other PURE UUID: 6f187b20-4f55-4b46-8b7f-d7c6f3f5c4bd dc.identifier.other ArXiv: http://arxiv.org/abs/1811.07934v1 dc.identifier.other Scopus: 85062035791 dc.identifier.uri http://hdl.handle.net/2299/20986 dc.description 12 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.abstract Cosmological 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.iso eng dc.relation.ispartof Astronomy & Astrophysics dc.rights /dk/atira/pure/core/openaccesspermission/open dc.subject astro-ph.HE dc.subject astro-ph.CO dc.subject astro-ph.GA dc.title The intergalactic magnetic field probed by a giant radio galaxy en dc.contributor.institution School of Physics, Astronomy and Mathematics dc.contributor.institution Centre for Astrophysics Research dc.description.status Peer reviewed dc.relation.school School of Physics, Astronomy and Mathematics dc.description.versiontype Final Accepted Version dcterms.dateAccepted 2018-10-09 rioxxterms.version AM rioxxterms.versionofrecord https://doi.org/10.1051/0004-6361/201833832 rioxxterms.type Journal Article/Review herts.preservation.rarelyaccessed true herts.rights.accesstype openAccess
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