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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 448204.0, MPI für Astronomie / Publikationen_mpia
Using optical/near-infrared interferometric polarimetry to place constraints on the disks surrounding Be stars
Authors:Mackay, F. E.; Elias, N. M.; Jones, C. E.; Sigut, T. A. A.
Language:English
Date of Publication (YYYY-MM-DD):2009
Title of Journal:The Astrophysical Journal
Journal Abbrev.:ApJ
Volume:704
Start Page:591
End Page:605
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:We present predictions for the normalized Stokes visibilities of a Be star disk, as would be measured by an interferometric polarimeter. Using both a simple geometric model for the disk as well as a more complex radiative transfer model, we investigate, in detail, the effect of each of the model parameters on the resultant normalized Stokes visibilities. We find normalized visibility amplitudes for the total star and disk system of ~10-2-10-3 at shorter baselines, and ~10-3-10-4 at longer baselines, requiring, at small and moderate baselines, an accuracy for interferometric polarization observations better than ~10-3-10-4, including all random and systematic errors. Provided this level of accuracy is attainable, we find that the Stokes Q visibility may be important both for the removal of model degeneracies present when considering the intensity alone, as well as for providing an estimate of the inclination angle of the disk.
Free Keywords:stars: emission-line; Be; techniques: interferometric; techniques: polarimetric
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/abs/2009ApJ...704..591M [ID No:1]
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