J/A+AS/131/401ivo://CDS.VizieR/J/A+AS/131/401CDSYudin R.V.Evans A.1998-08-25T12:40:29Z1998-08-25T12:39:35ZCDS support team

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

cds-question@unistra.frearly-type-starspolarimetryWe present and discuss optical polarimetry of a large group (60 objects) of peculiar early-type stars (Herbig Ae/Be stars and candidate members, B[e] stars, extreme emission line objects etc.). Most were taken from ``A new catalogue of members and candidate members of Herbig Ae/Be stellar group'' The et al. (1994, Cat. <J/A+AS/104/315>). For 40 out of the 60 objects polarization was measured for the first time. On the basis of the data we draw conclusions about the circumstellar shell configuration and orientation for several objects. Polarimetric variability on different time-scales (minutes...hours...days) was investigated, as well as comparison with earlier measurements to investigate variability over longer time-scales. No circular polarization was detected to a 5{sigma} level in most of the investigated stars. Polarimetric data obtained here as well as data available from the literature were analyzed from the point of investigating the evolutionary status of the objects. The relationship between the polarimetric and photometric data was also investigated.1998A&AS..131..401Yhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/131/401CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+AS/104/315 : Member of Herbig Ae/Be stellar group (The+ 1994)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/131/401https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/131/401http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/131/401https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/131/401https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/131/401http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/131/401GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+AS/131/401/position (Star positions)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+AS/131/401/position?https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/131/401/position?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/131/401/position?GETtext/xml+votable180.050000true115.951667-28.9550.005555555555555556https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+AS/131/401?format=asciiOpticaldefaultJ/A+AS/131/401/positionStar positionsNameStar namemeta.id;meta.maincharprimaryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination signpos.eq.dec;meta.mainJ/A+AS/131/401/tablesPolarimetryQQ Stokes parameter (x100)%phys.polarization.stokesfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharprimaryHJDJulian date of the middle of observationdtime.epochdoubleFiltFilter usedmeta.notecharTintBasic integration time for the corresponding filterstime.duration;obs.exposureintNintNumber of integrations from which the values were obtainedmeta.numberintPlinLinear polarisation%phys.polarizationfloate_Plinrms uncertainty on Plin%stat.errorfloatPAEquatorial position angledegpos.posAngfloate_PArms uncertainty on PA (North through East)degstat.errorfloatsigma1Internal error in PA (1)degstat.errorfloatUU Stokes parameter (x100)%phys.polarization.stokesfloatPcircCircular polarization%phys.polarizationfloate_Pcircrms uncertainty on Pcirc%stat.errorfloat