J/ApJ/759/25ivo://CDS.VizieR/J/ApJ/759/25doi:10.26093/cds/vizier.17590025CDSMao S.A.McClure-Griffiths N.M.Gaensler B.M.Haverkorn M.Beck R.,McConnell D.Wolleben M.Stanimirovic S.Dickey J.M.Staveley-Smith L.2014-08-28T16:18:25Z2014-08-13T15:01:33ZCDS support team

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

cds-question@unistra.frmagellanic-cloudsmagnetic-fieldspolarimetryWe present a study of the magnetic field of the Large Magellanic Cloud (LMC), carried out using diffuse polarized synchrotron emission data at 1.4GHz acquired at the Parkes Radio Telescope and the Australia Telescope Compact Array. The observed diffuse polarized emission is likely to originate above the LMC disk on the near side of the galaxy. Consistent negative rotation measures (RMs) derived from the diffuse emission indicate that the line-of-sight magnetic field in the LMC's near-side halo is directed coherently away from us. In combination with RMs of extragalactic sources that lie behind the galaxy, we show that the LMC's large-scale magnetic field is likely to be of quadrupolar geometry, consistent with the prediction of dynamo theory. On smaller scales, we identify two brightly polarized filaments southeast of the LMC, associated with neutral hydrogen arms. The filaments' magnetic field potentially aligns with the direction toward the Small Magellanic Cloud (SMC). We suggest that tidal interactions between the SMC and the LMC in the past 10^9^ years are likely to have shaped the magnetic field in these filaments.2012ApJ...759...25Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/759/25CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/6 : Polarization of Extragalactic Radio Sources (Eichendorf+ 1980)J/A+A/549/A56 : Rotation Measure synthesis of WSRT obs. (Iacobelli+, 2013)J/ApJ/755/21 : Rotation measures of extragalactic radio sources (Mao+, 2012)J/A+A/513/A65 : RMs in the fourth Galactic quadrant (Nota+, 2010)J/ApJ/714/1170 : Faraday rotation at high Galactic latitude (Mao+, 2010)J/ApJ/702/1230 : Rotation measure image of the sky (Taylor+, 2009)J/AJ/138/1243 : The star formation history of the LMC (Harris+, 2009)J/ApJ/688/1029 : Magnetic field in the SMC (Mao+, 2008)J/ApJS/45/97 : Extragal. Sources Faraday Rotation (Simard-Normandin+ 1981)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/759/25https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/759/25http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/759/25https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/759/25https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/759/25http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/759/25GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/759/25/table2 (Rotation measures of extragalactic sources toward the LMC from ATCA observations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/759/25/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/759/25/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/759/25/table2?GETtext/xml+votable180.050000true94.3397083-68.50760.0055555555555555565/8259 8261 8262 8264 8265 8268 8269 8271 8276 8282 8283 8284 9354 9378 6/32895 33031 33041 33042 33043 33052 33053 33055 33064 33065 33066 33069 33081 33083 33088 33089 33090 33092 33093 33095 33096 33097 33098 33101 33102 33103 33111 33112 33114 33115 33116 33118 33119 33121 33122 33123 33124 33125 33127 33140 33141 33144 33145 33146 33148 33220 33221 33232 33793 33794 33795 33796 33797 33798 33800 33802 33803 33824 37409 37411 37504 37505 37506 37536 37538 37544 37546 38912 38914 38920 38922 389449.276497240453405e-25 9.276497240453405e-25https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/759/25?format=asciidefaultJ/ApJ/759/25/table2Rotation measures of extragalactic sources toward the LMC from ATCA observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainRM[-161/275] Rotation measurerad.m**-2phys.polarization.rotMeasureinte_RM[1/32] RM uncertaintyrad.m**-2stat.errorintPI[1.5/33.3] De-biased polarized flux at 1.4GHz (1)mJyphot.flux.density;em.radio.750-1500MHzfloatI[7.4/1240] Total intensity at 1.4GHz (1)mJyphot.flux.density;em.radio.750-1500MHzfloatFit?[lmc fg] Used in fit? (2)meta.codechar