J/MNRAS/467/1776ivo://CDS.VizieR/J/MNRAS/467/1776doi:10.26093/cds/vizier.74671776CDSKaczmarek J.F.Purcell C.R.Gaensler B.M.McClure-Griffiths N.M.,Stevens J.2024-08-17T20:18:10Z2019-12-06T16:17:40ZCDS support team

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

cds-question@unistra.frmagellanic-cloudsmagnetic-fieldspolarimetryWe present an investigation into the magnetism of the Magellanic Bridge, carried out through the observation of Faraday rotation towards 167 polarized extragalactic radio sources spanning the continuous frequency range of 1.3-3.1GHz with the Australia Telescope Compact Array. Comparing measured Faraday depth values of sources 'on' and 'off' the Bridge, we find that the two populations are implicitly different. Assuming that this difference in populations is due to a coherent field in the Magellanic Bridge, the observed Faraday depths indicate a median line-of-sight coherent magnetic-field strength of B||~=0.3uG directed uniformly away from us. Motivated by the varying magnitude of Faraday depths of sources on the Bridge, we speculate that the coherent field observed in the Bridge is a consequence of the coherent magnetic fields from the Large and Small Magellanic Clouds being pulled into the tidal feature. This is the first observation of a coherent magnetic field spanning the entirety of the Magellanic Bridge and we argue that this is a direct probe of a 'pan-Magellanic' field.2017MNRAS.467.1776Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/467/1776CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/339/105 : Western Magellanic Bridge HI observations (Muller+, 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/467/1776https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/467/1776http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/467/1776https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/467/1776https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/467/1776http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/467/1776GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/467/1776/tableb1 (Table of the Faraday depth values for each polarized source used in our analysis)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/467/1776/tableb1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/467/1776/tableb1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/467/1776/tableb1?GETtext/xml+votable180.050000true55.11779-67.055250.0055555555555555565/8237 8239 8248 8250 6/32781-32782 32806-32807 32815 32817 32822 32827 32829 32841 32845 32856-32857 32862-32863 32869 32871 32877-32879 32882 32884 32887-32888 32894-32895 32902-32903 32906 32911-32912 32920 32934 32954 32965 32967 32969-32970 32974-32975 32978-32979 32985 32987 32990-32991 32996-32998 33004-33006 33008 33014 33018 33022-33023 33030-33031 33033-33034 33036 33039 33048 33050 33056-33057 33059 33062-33063 33065-33066 33069 33072 33154 33160 33166 33189 33194-33195 33300 33302 33309 33344-33345 33349 33352 33360-33361 33364https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/467/1776?format=asciidefaultJ/MNRAS/467/1776/tableb1Table of the Faraday depth values for each polarized source used in our analysisrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNote[*] Note (1)meta.notecharGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latP0Intrinsic polarization fraction%phys.polarization.lineardoublee_P0rms uncertainty on P0 (1{sigma})%stat.errorfloatpsi0Intrinsic polarization angledegpos.posAng;phys.polarizationfloate_psi0rms uncertainty on psi0 (1{sigma})degstat.errorfloatphirawObserved Faraday depthrad.m**-2phys.absorption.opticalDepthfloate_phirawrms uncertainty on phiraw (1{sigma})rad.m**-2stat.errorfloatsigmaphiFaraday dispersionrad.m**-2instr.dispersionfloate_sigmaphirms uncertainty on sigmaphi (1{sigma})rad.m**-2stat.errorfloatphicorrFaraday depth of each source once the Faraday rotation due to the MW foreground has been corrected forrad.m**-2phys.absorption.opticalDepthfloate_phicorrrms uncertainty on phicorrrad.m**-2stat.errorfloat_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decnullableindexed