J/MNRAS/495/2607ivo://CDS.VizieR/J/MNRAS/495/2607doi:10.26093/cds/vizier.74952607CDSO'Sullivan S.P.Bruggen M.Vazza F.Carretti E.Locatelli N.T.,Stuardi C.Vacca V.Vernstrom T.Heald G.Horellou C.Shimwell T.W.,Hardcastle M.J.Tasse C.Rottgering H.2024-08-21T20:14:38Z2022-06-23T08:02:50ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.fractive-galactic-nucleiradio-sourcespolarimetryMeasuring the properties of extragalactic magnetic fields through the effect of Faraday rotation provides a means to understand the origin and evolution of cosmic magnetism. Here, we use data from the LOFAR Two-Metre Sky Survey (LoTSS) to calculate the Faraday rotation measure (RM) of close pairs of extragalactic radio sources. By considering the RM difference ({Delta}RM) between physical pairs (e.g. double-lobed radio galaxies) and non-physical pairs (i.e. close projected sources on the sky), we statistically isolate the contribution of extragalactic magnetic fields to RM along the line of sight between non-physical pairs. From our analysis, we find no significant difference between the RM distributions of the physical and non-physical pairs, limiting the excess Faraday rotation contribution to <1.9rad/m^2^ (~95 per cent confidence). We use this limit with a simple model of an inhomogeneous universe to place an upper limit of 4nG on the cosmological co-moving magnetic field strength on Mpc scales. We also compare the RM data with a more realistic suite of cosmological magnetohydrodynamical simulations that explore different magnetogenesis scenarios. Both magnetization of the large-scale structure by astrophysical processes such as galactic and AGN outflows, and simple primordial scenarios with seed magnetic field strengths <0.5nG cannot be rejected by the current data; while stronger primordial fields or models with dynamo amplification in filaments are disfavoured.2020MNRAS.495.2607Ohttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/495/2607CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-tohttps://lofar-surveys.org : LOFAR Home Pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/495/2607https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/495/2607http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/495/2607https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/495/2607https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/495/2607http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/495/2607GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/495/2607/table2 (Coordinates, angular separation and RM values of all sources in the sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/495/2607/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/495/2607/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/495/2607/table2?GETtext/xml+votable180.050000true4.53862531.02199720.0055555555555555566/692 694 2074 2081 2085 2087 2105 2107 2109 2212 2313 2322 2356 2447 2565 2567 2625 2633 4260 4342 4349 4467 4490 4514-4515 4577 4606 4668 5018 5305 5307 5351 5388 5457 5459 5507 5539 5552-5553 5555 5558 5571 5592 5614 5671-5672 5717 5731 5747 5773 5784-5785 5796 5809 5811 5821 5826 5878 5886-5887 5908 5916 5927 5929-5930 5933 5944-5945 5951 5987 5992-5993 6007 6010 6022 6027 6043-6044 6067 6085 6107 6114 6141 6242 6360 6362 6424 6472 6518 6549 6551 7174 7221 7238 7261 7280 7294 7383 7386 7419 7475 7478 7586 7590 7592-7593 7693 7758 7772 7774 7780-7781 7783 7829-7830 7920 7923 7938 7944 7946 8049 8054 9022-9023 9085 9118 9191 9196-9197 9200 9202 9210 9291 9330 9379 9396 9402 9407 9429 9497 9517 9577 9601 9801 9809 9817 9851 9915-9916 9928 9937 9956 9958 9964 9979 9981 10118-10119 10300 10302 10307 10346 10368 10415 10426 10455 10459 10481 10588 10597 10608-10609 10624 10634 10651 10657 10675 10718 10745-10746 10748 10804 10812 10814 10837 10859 10892 10933 10935 10945 10951 10957-10958 10972 10974 10976 10995 11010 11012 11028 11031 11064 11066 11069 11071-11072 11074 11077-11078 11088 11114 11124 11127 11133 11151 11160 11168 11171-11172 11175 11182 11186 11191 11197 11199 11221-11222 11241 11244-11245 11249 11265 11282 11316 11343 11345 11367 11379 11386 11389 11417 11430 11460 11462 11611 11658 11706 11754-11755 11768 11781 11787 11792 11794 12099 14998 15013 15320 15323 15345 15350 16014-16015 16081 19166 19188 19724-19725 19730 19736 19838 19916 19997 19999 20091 20121 20207 20218 20232-20233 20268 20312 20327 23386 28067 28117 28154 28244 28429 28446 28458 28545 28619 32500 32663 32665 32691 32712 32728-32729 32757https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/495/2607?format=asciiRadiodefaultJ/MNRAS/495/2607/table2Coordinates, angular separation and RM values of all sources in the samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDRM pair identifier NNNp (1)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainSepAngular separation between pairsarcminpos.angDistancefloatRMFaraday rotation measurerad.m**-2phys.polarization.rotMeasurefloate_RMFaraday rotation measure uncertainty (2)rad.m**-2stat.errorfloat