J/MNRAS/465/559ivo://CDS.VizieR/J/MNRAS/465/559doi:10.26093/cds/vizier.74650559CDSSoam A.Maheswar G.Lee C.W.Neha S.Andersson B.-G.2024-08-17T20:17:22Z2019-03-13T08:44:56ZCDS support team

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

cds-question@unistra.frh-ii-regionsmolecular-cloudspolarimetryBright-rimmed clouds (BRCs) are formed at the periphery of HII regions as the radiation from the central star interacts with dense gas. The ionization and resulting compression of the clouds may lead to cloud disruption causing secondary star formation depending on the stellar and gas parameters. Here we use R-band polarimetry to probe the plane-of-the sky magnetic field for two nearby BRCs, IC 59 and IC 63. Both nebulae are illuminated by {gamma} Cas with the direction of the ionizing radiation being orientated parallel or perpendicular to the local magnetic field, allowing us to probe the importance of magnetic field pressure in the evolution of BRCs. Because of the proximity of the system (~200pc), we have acquired a substantial sample of over 500 polarization measurements for stars that form the background to the nebulae. On large scales, the magnetic field geometries of both clouds are anchored to the ambient magnetic field. For IC 63, the magnetic field is aligned parallel to the head-tail morphology of the main condensation, with a convex morphology relative to the direction of the ionizing radiation. We estimate the plane-of-the-sky magnetic field strength in IC 63 to be ~90{mu}G. In IC 59, the projected magnetic field follows the M-shape morphology of the cloud. Here, field lines present a concave shape with respect to the direction of the ionizing radiation from {gamma} Cas. Comparing our observations to published theoretical models, we find good general agreement, supporting the importance of magnetic fields in BRC evolution.2017MNRAS.465..559Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/465/559CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/465/559https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/465/559http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/465/559https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/465/559https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/465/559http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/465/559GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/465/559/ic59pol (Bright-rimmed cloud IC59 optical polarization)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/465/559/ic59pol?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/465/559/ic59pol?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/465/559/ic59pol?GETtext/xml+votable180.050000true14.32859561.135860.005555555555555556Cone search capability for table J/MNRAS/465/559/ic63pol (Bright-rimmed cloud IC63 optical polarization)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/465/559/ic63pol?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/465/559/ic63pol?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/465/559/ic63pol?GETtext/xml+votable180.050000true14.72581560.952311940.0055555555555555566/3030-3031https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/465/559?format=asciidefaultJ/MNRAS/465/559/ic59polBright-rimmed cloud IC59 optical polarizationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainPFraction of polarization%phys.polarizationfloate_PUncertainties in fraction of polarization%stat.errorfloatPAPolarization position angle measured from North increasing towards eastdegpos.posAnginte_PAUncertainties in polarization position angledegstat.errorintJ/MNRAS/465/559/ic63polBright-rimmed cloud IC63 optical polarizationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainPFraction of polarization%phys.polarizationfloate_PUncertainties in fraction of polarization%stat.errorfloatPAPolarization position angle measured from North increasing towards eastdegpos.posAnginte_PAUncertainties in polarization position angledegstat.errorint