J/A+A/409/933ivo://CDS.VizieR/J/A+A/409/933doi:10.26093/cds/vizier.34090933CDSFeinstein C.Baume G.Vergne M.M.Vazquez R.A.2003-11-20T18:16:40Z2003-11-20T19:16:11ZCDS support team

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

cds-question@unistra.fropen-star-clusterspolarimetryinfrared-photometryvisible-astronomybroad-band-photometryWe present (UBVRI) multicolor linear polarimetric data for 26 of the brightest stars in the area of the open cluster Stock 16 that were considered to study the properties of the ISM (interstellar medium) towards the cluster. Our data yield a mean polarization percentage of P~2.5%, close to the polarization value produced by the ISM with normal efficiency (P_{lambda}_max_~5E_B-V_) undergoing a color excess of E_B-V_=0.51. The mean angle of the polarization vectors, {theta}=74.9deg, agrees quite well with the expected angle produced by dust particles aligned in the direction of the galactic disk (and the magnetic field) in the region. A study of the extinction suffered by the stars in the zone was also performed combining our new data with previous photometric data. In this sense, our analysis indicates that the visual absorption affecting Stock 16 stars is mainly produced in front of the cluster by a dust cloud at approximately 500 pc from the sun. The large polarization value of the non-member star, WR 51, confirms its background star nature.2003A&A...409..933Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/409/933CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/409/933https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/409/933http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/409/933https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/409/933https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/409/933http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/409/933GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/A+A/409/933/table1Polarimetric observations of stars in Stock 16Filter[UBVRI] Filtermeta.code;instr.filtercharPolPolarimetry%phys.polarizationfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar name (Star NNN, Star WR NN, Star A)meta.id;meta.mainchare_Polrms uncertainty on Pol%stat.errorfloatthetaPosition angle (North to East)degpos.posAngfloate_thetarms uncertainty on thetadegstat.errorfloatSIMBADDesignation of star in SIMBADmeta.refcharJ/A+A/409/933/table2Parameters of the Serkowski fit to the linear polarization data for stars in Stock 16recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar name (Star NNN, Star WR NN, Star A)meta.id;meta.maincharPmaxMaximum interstellar linear polarisation percentage%phys.polarizationfloate_Pmaxrms uncertainty on Pmax%stat.errorfloatsigma1Unit weight error of the fit (1)stat.errorfloatlambdamaxWavelength at which the maximum interstellar linear polarisation occurs, {lambda}_max_umem.wlfloate_lambdamaxrms uncertainty on lambdamaxumstat.errorfloatepsilonDispersion of the position angle normalized by the average of the position angle errorsstat.errorfloatSIMBADDesignation of star in SIMBADmeta.refchar