J/ApJ/909/149ivo://CDS.VizieR/J/ApJ/909/149doi:10.26093/cds/vizier.19090149CDSGhoreyshi M.R.Carciofi A.C.Faes D.M.2021-07-05T11:11:35Z2021-04-16T09:38:19ZCDS support team

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

cds-question@unistra.frbe-starsvariable-starsphotometrypolarimetryThe fact that the emission lines seen in the optical spectra of the Be stars originate from a Keplerian circumstellar disk surrounding the central star is gaining more and more observational and theoretical supports. Among all the proposed models explaining the physics of such disks, the Viscous Decretion Disk (VDD) paradigm matches best with the observations. In this work, we challenge the VDD model by applying it to the variety of data of the Be star {omega} CMa observed by different techniques. We find that the VDD model explains the data well, qualitatively. However, we see some quantitative discrepancies that in turn are clues for better understanding the underlying physics of the Be disks. We investigate the possibilities of existing an undetected binary companion, and a radially variable viscous parameter, {alpha} to explain the mismatch between the data and the model.2021ApJ...909..149Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/909/149CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/909/149https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/909/149http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/909/149https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/909/149https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/909/149http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/909/149GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap3.322582951404819e-19 3.852589004194616e-19defaultJ/ApJ/909/149/photomV-band data of the Be star {omega} CMarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDModified Julian datedtime.epochdoubleVmagV magnitudemagphot.mag;em.opt.Vfloate_Vmagrms uncertainty on Vmagmagstat.error;phot.magfloatJ/ApJ/909/149/polarimePolarimetric data of the Be star {omega} CMaFilt[UBVRI] Filtermeta.id;instr.filtercharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDModified Julian datedtime.epochdoubleObs.dateObservation datetime.epoch;obsnullablePPolarisation degree P in filter%phys.polarization;instr.filterfloatQStock parameter Q in filter%stat.param;instr.filterfloatUStock parameter U in filter%stat.param;instr.filterfloatthetaPolarisation angle in filterdegphys.polarization;instr.filterfloate_Prms uncertainty on P%stat.errorfloate_thetarms uncertainty on thetadegstat.error;pos.posAngfloat