J/ApJ/806/94ivo://CDS.VizieR/J/ApJ/806/94doi:10.26093/cds/vizier.18060094CDSGomes A.L.Magalhaes A.M.Pereyra A.Rodrigues C.V.2018-01-30T07:17:50Z2015-11-10T15:16:55ZCDS support team

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

cds-question@unistra.frmagellanic-cloudspolarimetryvisible-astronomybroad-band-photometryWe present a new optical polarimetric catalog for the Small Magellanic Cloud (SMC). It contains a total of 7207 stars, located in the northeast (NE) and Wing sections of the SMC and part of the Magellanic Bridge. This new catalog is a significant improvement compared to previous polarimetric catalogs for the SMC. We used it to study the sky-projected interstellar magnetic field structure of the SMC. Three trends were observed for the ordered magnetic field direction at position angles (PAs) of (65{deg}+/-10{deg}), (115{deg}+/-10{deg}), and (150{deg}+/-10{deg}). Our results suggest the existence of an ordered magnetic field aligned with the Magellanic Bridge direction and SMC's Bar in the NE region, which have PAs roughly at 115.4{deg} and 45{deg}, respectively. However, the overall magnetic field structure is fairly complex. The trends at 115{deg} and 150{deg} may be correlated with the SMC's bimodal structure, observed in Cepheids' distances and HI velocities. We derived a value of B_sky_=(0.497+/-0.079){mu}G for the ordered sky-projected magnetic field, and {delta}B=(1.465+/-0.069){mu}G for the turbulent magnetic field. This estimate of B_sky_ is significantly larger (by a factor of ~10) than the line of sight field derived from Faraday rotation observations, suggesting that most of the ordered field component is on the plane of the sky. A turbulent magnetic field stronger than the ordered field agrees with observed estimates for other irregular and spiral galaxies. For the SMC the B_sky_/{delta}B ratio is closer to what is observed for our Galaxy than other irregular dwarf galaxies.2015ApJ...806...94Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/806/94CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/236 : UBVR CCD survey of the Magellanic clouds (Massey+, 2002)II/226 : Stellar polarization catalogs agglomeration (Heiles, 2000)J/MNRAS/442/1663 : Velocities of red giants in the SMC (Dobbie+, 2014)J/ApJ/698/2031 : Polarimetry of HAeBe stars (Rodrigues+, 2009)J/ApJ/688/1029 : Magnetic field in the SMC (Mao+, 2008)J/A+AS/91/171 : Blue stars between Magellanic Clouds (Demers+ 1991)J/A+AS/30/261 : UBV and Radial Velocities of SMC Supergiants (Ardeberg+, 1977)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/806/94https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/806/94http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/806/94https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/806/94https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/806/94http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/806/94GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/806/94/table7 (Polarimetric catalog (observed polarization))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/806/94/table7?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/806/94/table7?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/806/94/table7?GETtext/xml+votable180.050000true15.0220417-71.82950830.005555555555555556Cone search capability for table J/ApJ/806/94/table8 (Polarimetric catalog (intrinsic polarization))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/806/94/table8?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/806/94/table8?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/806/94/table8?GETtext/xml+votable180.050000true15.0220417-71.82950830.0055555555555555566/32950 32951 32956 32957 32958 33295 33297 33298 33299 33304 33305 33306 333283.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/806/94?format=asciiOpticaldefaultJ/ApJ/806/94/table7Polarimetric catalog (observed polarization)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqIdentification of field objectmeta.id;meta.mainintprimaryIPlink to intrinsic polarizationmeta.ref.urlcharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainPobs[0.027/5.2] Observed polarization%phys.polarizationfloate_Pobs[0.001/1.6] Error in Pobs%stat.errorfloatPAintPosition angle of observed polarizationdegpos.posAng;phys.polarizationfloatVmag[9.6/20.7] The V band magnitudemagphot.mag;em.opt.Vdoublee_Vmag[0.0004/0.3] Error in Vmagmagstat.error;phot.mag;em.opt.VdoubleMDisplay multiple measures within 0.1"meta.ref.urlintnullableJ/ApJ/806/94/table8Polarimetric catalog (intrinsic polarization)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqIdentification of field objectmeta.id;obs.fieldintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainPint[0.05/5.5] Intrinsic polarization%phys.polarizationfloate_Pint[0.01/1.6] Error in Pint%stat.errorfloatPAintPosition angle of intrinsic polarizationdegpos.posAng;phys.polarizationfloatVmag[14.2/20.7] The V band magnitudemagphot.mag;em.opt.Vdoublee_Vmag[0.001/0.3] Error in Vmagmagstat.error;phot.mag;em.opt.Vdouble