J/MNRAS/403/1577ivo://CDS.VizieR/J/MNRAS/403/1577doi:10.26093/cds/vizier.74031577CDSMedhi B.J.Maheswar G.Pandey J.C.Tamura M.Sagar R.2024-08-12T20:12:57Z2012-03-23T14:21:56ZCDS support team

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

cds-question@unistra.fropen-star-clusterspolarimetryWe present multiwavelength linear polarimetric observations of 104 stars towards the region of young open cluster NGC 6823. The polarization towards NGC 6823 is dominated by foreground dust grains and we found evidence for the presence of several layers of dust towards the line of sight. The first layer of dust is approximately located within 200pc towards the cluster, which is much closer to the Sun than the cluster itself (~2.1kpc). The radial distribution of the position angles for the member stars is found to show a systematic change, while the polarization is found to reduce towards the outer parts of the cluster and the average position angle of the coronal region of the cluster is very close to the inclination of the Galactic parallel (~32{deg}). The size distribution of the grains within NGC 6823 is similar to those in the general interstellar medium. The patchy distribution of foreground dust grains is suggested to be mainly responsible for both differential reddening and polarization towards NGC 6823. The majority of the observed stars do not show evidence of intrinsic polarization in their light.2010MNRAS.403.1577Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/403/1577CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/403/1577https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/403/1577http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/403/1577https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/403/1577https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/403/1577http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/403/1577GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/403/1577/stars (Observed B, V and Rc polarization, and derived parameters the stars observed in NGC 6823 (tables 2 and 4 of paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/403/1577/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/403/1577/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/403/1577/stars?GETtext/xml+votable180.050000true295.712523.31172220.0055555555555555566/14353https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/403/1577?format=asciidefaultJ/MNRAS/403/1577/starsObserved B, V and Rc polarization, and derived parameters the stars observed in NGC 6823 (tables 2 and 4 of paper)ID(M)ID according to this observation, <[MMP2010] NNN> in Simbadmeta.id;meta.mainintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID(B)ID according to Barkhatova (1957SvA.....1..822B), NGC 6823 NNNameta.idcharVmagV magnitudemagphot.mag;em.opt.VfloatBpolMeasured value of polarization in B band%phys.polarizationfloate_Bpolrms uncertainty on PB%stat.errorfloatBpaPolarization position angle (of the E vector) in B banddegpos.posAng;phys.polarizationinte_Bparms uncertainty on PABdegstat.errorinte_Vparms uncertainty on PAVdegstat.errorintVpolMeasured value of polarization in V band%phys.polarizationfloate_Vpolrms uncertainty on PV%stat.errorfloatVpaPolarization position angle (of the E vector) in V banddegpos.posAng;phys.polarizationintRpolMeasured value of polarization in R band%phys.polarizationfloate_Rpolrms uncertainty on PR%stat.errorfloatRpaPolarization position angle (of the E vector) in R banddegpos.posAng;phys.polarizationinte_Rparms uncertainty on PARdegstat.errorintMP(E)[0,1]? Membership probability according to Erickson (1971A&A....10..270E)stat.probabilityfloatnullableMP(D)[0,1]? Membership probability according to Dias et al. (2006, Cat. J/A+A/446/949)stat.probabilityfloatnullableRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainPmaxMaximum polarization%phys.polarization;stat.maxfloate_Pmaxrms uncertainty on Pmax%stat.errorfloatl.maxWavelength of maximal polarisationumem.wlfloate_l.maxrms uncertainty on lammaxumstat.errorfloatsig1{sigma}1 parameter (the unit weighting error of the fit) (2)stat.fit.paramfloat<eps>Dispersion of the position angle <{epsilon}>, normalized by the mean position angle errorstat.fit.paramfloatE(B-V)? Reddenningmagphot.color.excessfloatnullabler_E(B-V)[GSE] Reference for E(B-V) (1)meta.ref;pos.framechar