J/ApJ/749/71ivo://CDS.VizieR/J/ApJ/749/71doi:10.26093/cds/vizier.17490071CDSPavel M.D.Clemens D.P.Pinnick A.F.2013-12-28T21:44:51Z2013-12-09T09:03:49ZCDS support team

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

cds-question@unistra.frgalaxy-planesmilky-way-galaxypolarimetryinfrared-photometryThis work combines new observations of NIR starlight linear polarimetry with previously simulated observations in order to constrain dynamo models of the Galactic magnetic field. Polarimetric observations were obtained with the Mimir instrument on the Perkins Telescope in Flagstaff, AZ, along a line of constant Galactic longitude ({ell}=150{deg}) with 17 pointings of the 10'x10' field of view between -75{deg}<b<10{deg}, with more frequent pointings toward the Galactic midplane. A total of 10962 stars were photometrically measured and 1116 had usable polarizations. The observed distribution of polarization position angles with Galactic latitude and the cumulative distribution function of the measured polarizations are compared to predicted values. While the predictions lack the effects of turbulence and are therefore idealized, this comparison allows significant rejection of A0-type magnetic field models. S0 and disk-even halo-odd magnetic field geometries are also rejected by the observations, but at lower significance. New predictions of spiral-type, axisymmetric magnetic fields, when combined with these new NIR observations, constrain the Galactic magnetic field spiral pitch angle to -6{deg}+/-2{deg}.2012ApJ...749...71Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/749/71CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)II/226 : Stellar polarization catalogs agglomeration (Heiles, 2000)J/AJ/137/4377 : List of SEGUE plate pairs (Yanny+, 2009)J/AJ/110/268 : Red and infrared polarimetry in galactic plane (Creese+ 1995)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/749/71https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/749/71http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/749/71https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/749/71https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/749/71http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/749/71GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/749/71/table2 (Starlight polarization observations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/749/71/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/749/71/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/749/71/table2?GETtext/xml+votable180.050000true19.7875471-13.68381720.0055555555555555566/548 573 905 926 927 1008 1697 1716 1718 1766 1779 1782 1954 1955 1958 1970 2018 17452 17627 178308.650015785639275e-20 1.2918781580533825e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/749/71?format=asciiInfrareddefaultJ/ApJ/749/71/table2Starlight polarization observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latPol[0/15.1] Polarization percentage (P) in H-band%phys.polarizationfloate_Pol[0.05/5] Uncertainty in Pol%stat.errorfloatGPA[0/180] Galactic position angledegpos.posAng;phys.polarizationfloate_GPA[0.5/180] Uncertainty in GPA (1)degstat.errorfloatHmag[8.5/16.5]? 2MASS H-band magnitudemagphot.mag;em.IR.Hfloatnullableu_Hmag[p] p: poor H photometrymeta.code.errorchare_Hmag? Uncertainty in Hmagmagstat.error;phot.mag;em.IR.HfloatnullableKsmag[8.3/15.9]? 2MASS Ks-band magnitudemagphot.mag;em.IR.Kfloatnullableu_Ksmag[p] p: poor Ks photometrymeta.code.errorchare_Ksmag? Uncertainty in Ksmagmagstat.error;phot.mag;em.IR.Kfloatnullable2MCross-match with the 2MASS PSC (Cat. II/246) within 2"meta.ref.urlintnullable_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)degpos.eq.decnullableindexed