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Catalog Service:
Be star omega CMa V light curve & polarimetry

Short name: J/ApJ/909/149
IVOA Identifier: ivo://CDS.VizieR/J/ApJ/909/149
DOI (Digital Object Identifier): 10.26093/cds/vizier.19090149
Publisher: CDS[+][Pub. ID]
More Info: https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/909/149
VO Compliance: Level 2: This is a VO-compliant resource.
Status: active
Registered: 2021 Apr 16 09:38:19Z
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Description


The 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.

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