J/ApJ/603/584ivo://CDS.VizieR/J/ApJ/603/584doi:10.26093/cds/vizier.16030584CDSPereyra A.Magalhaes A.M.2017-07-05T06:59:36Z2008-06-03T09:45:13ZCDS support team

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

cds-question@unistra.frmolecular-cloudspolarimetryWe have used CCD imaging polarimetry to obtain linear polarization measurements of background stars toward the filamentary Musca dark cloud. We present a catalog of 2497 objects with polarization signal-to-noise ratio larger than 5. This allows us to build polarization maps to infer the detailed geometry of the local magnetic field. We show composite polarization maps along the cloud and explore general correlations of the polarimetric data with the morphology of the region. We find the overall field to be strikingly aligned with the projected small axis of the filamentary cloud. We detect a lower limit for the polarization across the cloud of ~2%, with an enhanced polarization of 6%-7% in the central region. We find evidence that the polarization pattern is altered in the inner regions, those associated with higher extinction.2004ApJ...603..584Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/603/584CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+AS/93/373 : uvby-beta photometry in SA 203 (Franco 1992)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/603/584https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/603/584http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/603/584https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/603/584https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/603/584http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/603/584GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/603/584/fields (Analysis of the 35 fields in Musca dark cloud)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/603/584/fields?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/603/584/fields?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/603/584/fields?GETtext/xml+votable180.050000true188.8630417-70.87535830.005555555555555556Cone search capability for table J/ApJ/603/584/table3 (Field data)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/603/584/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/603/584/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/603/584/table3?GETtext/xml+votable180.050000true188.6815417-70.9204750.0055555555555555566/41513 41515 41516 41518https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/603/584?format=asciiOpticaldefaultJ/ApJ/603/584/fieldsAnalysis of the 35 fields in Musca dark cloudRegionRegionmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFNumField numbermeta.id;obs.fieldintprimaryNNumber of objects with Pol/e_Pol>10 in the fieldmeta.numberintPolMean polarization value%phys.polarization;stat.meanfloate_PolAssociated error to Pol%stat.errorfloatPAMean polarization position angledegpos.posAng;stat.meanfloate_PAAssociated error to PAdegstat.errorfloatRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (2000.0)pos.eq.dec;meta.mainRunRun numbermeta.id;meta.mainintJ/ApJ/603/584/table3Field datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFNumField number (1)meta.id;obs.fieldintIDObject identification number (1)meta.id;meta.mainintn_IDNote detailled in file "notes.dat"meta.notecharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainPolVPercent linear polarization in the V band%phys.polarization.linearfloate_PolVMeasured error in PolV (2)%stat.errorfloatPAPolarization position angle (3)degpos.posAngfloatVmagThe V band magnitudemagphot.mag;em.opt.VfloatJ/ApJ/603/584/notesNotesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNoteNote designationmeta.notecharTextText of the notemeta.notechar