J/MNRAS/462/2266ivo://CDS.VizieR/J/MNRAS/462/2266doi:10.26093/cds/vizier.74622266CDSSeron Navarrete J.C.Roman-Lopes A.Santos F.P.Franco G.A.P.Reis W.2024-08-16T20:18:17Z2016-08-29T09:15:34ZCDS support team

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

cds-question@unistra.frh-ii-regionspolarimetrymagnetic-fieldsWe present a polarimetric study of the RCW121 star-forming region to derive the orientation of the sky-projected magnetic field component traced by the polarization vectors, the morphology of which tends to follow the cloud's structure. Individual polarization-angle values are consistent across the different bands, having a broad distribution towards the RCW121 HII region. We estimate the corresponding magnetic field orientation in the HII region to have a mean value of -12+/-7{deg}. RCW121 shows an elongated shape in the same direction as the magnetic field orientation, which may be evidence that magnetic pressure opposes the HII region expansion. Serkowski's relation was used to determine individual values of the total-to-selective extinction ratio (RV ) distribution and a weighted mean value of RV=3.17+/-0.05. We derive a foreground component of the polarization degree that is consistent with the literature value for this Galactic region.2016MNRAS.462.2266Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/462/2266CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/462/2266https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/462/2266http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/462/2266https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/462/2266https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/462/2266http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/462/2266GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/462/2266/rcw121po (Polarimetric parameters for 2655 stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/462/2266/rcw121po?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/462/2266/rcw121po?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/462/2266/rcw121po?GETtext/xml+votable180.050000true259.67716-39.378050.0055555555555555566/42436 42438https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/462/2266?format=asciidefaultJ/MNRAS/462/2266/rcw121poPolarimetric parameters for 2655 starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarIDV? Star unique ID, when V data (1)meta.idlongnullableRAV? Right ascension (J2000.0) for a star with V filter datadegpos.eq.ra;meta.mainnullableDEV? Declination (J2000.0) for a star with V filter datadegpos.eq.dec;meta.mainnullableqV? q Stoke parameter in V filterphys.polarization.stokesdoublenullableuV? u Stoke parameter in V filterphys.polarization.stokesdoublenullablePdpV? Debiassed polarization degree value for V filter%phys.polarizationdoublenullablee_PdpV? Error of PdpV%stat.errorfloatnullablethetaFV? Corrected polarization angle for V filterdegpos.posAng;phys.polarizationfloatnullablee_thetaFV? Error of polarization angle for V filterdegstat.errordoublenullableStarIDR? Star unique ID, when R data (1)meta.idlongnullableRARdeg? Right ascension (J2000.0) for a star with R filter datadegpos.eq.ranullableDERdeg? Declination (J2000.0) for a star with R filter datadegpos.eq.decnullableqR? q Stoke parameter in R filterphys.polarization.stokesdoublenullableuR? u Stoke parameter in R filterphys.polarization.stokesdoublenullablePdpR? Debiassed polarization degree value for R filter%phys.polarizationdoublenullablee_PdpR? Error of PdpR in percentage%stat.errorfloatnullablethetaFR? Corrected polarization angle for R filterdegpos.posAng;phys.polarizationfloatnullablee_thetaFR? Error of polarization angle for R filterdegstat.errordoublenullableStarIDVI? Star unique ID, when I data (1)meta.idlongnullableRAIdeg? Right ascension (J2000.0) for a star with I filter datadegpos.eq.ranullableDEIdeg? Declination (J2000.0) for a star with I filter datadegpos.eq.decnullableqI? q Stoke parameter in I filterphys.polarization.stokesdoublenullableuI? u Stoke parameter in I filterphys.polarization.stokesdoublenullablePdpI? Debiassed polarization degree value for I filter%phys.polarizationdoublenullablee_PdpI? Error of PdpI%stat.errorfloatnullablethetaFI? Corrected polarization angle for I filterdegpos.posAng;phys.polarizationfloatnullablee_thetaFI? Error of polarization angle for I filterdegstat.errordoublenullableStarIDVH? Star unique ID, when H data (1)meta.idlongnullableRAHdeg? Right ascension (J2000.0) for a star with H filter datadegpos.eq.ranullableDEHdeg? Declination (J2000.0) for a star with H filter datadegpos.eq.decnullableqH? q Stoke parameter in H filterphys.polarization.stokesdoublenullableuH? u Stoke parameter in H filterphys.polarization.stokesdoublenullablePdpH? Debiassed polarization degree value for H filter%phys.polarizationdoublenullablee_PdpH? Error of PdpH%stat.errorfloatnullablethetaFH? Corrected polarization angle for H filterdegpos.posAng;phys.polarizationfloatnullablee_thetaFH? Error of polarization angle for H filterdegstat.errordoublenullable