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The dynamical evolution of Be star disks

Published online by Cambridge University Press:  12 July 2011

Xavier Haubois ,
Alex C. Carciofi ,
Atsuo T. Okazaki  and
Jon E. Bjorkman
Xavier Haubois
Affiliation:
Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de São Paulo, Rua do Matão 1226, Cidade Universitária, São Paulo, SP 05508-900, Brazil email: xhaubois@astro.iag.usp.br
Alex C. Carciofi
Affiliation:
Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de São Paulo, Rua do Matão 1226, Cidade Universitária, São Paulo, SP 05508-900, Brazil email: xhaubois@astro.iag.usp.br
Atsuo T. Okazaki
Affiliation:
Faculty of Engineering, Hokkai-Gakuen University, Toyohira-ku, Sapporo 062-8605, Japan
Jon E. Bjorkman
Affiliation:
University of Toledo, Department of Physics & Astronomy, MS111 2801 W. Bancroft Street Toledo, OH 43606, USA
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Abstract

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We present a novel theoretical tool to analyze the dynamical behaviour of a Be disk fed by non-constant decretion rates. It is mainly based on the computer code HDUST, a fully three-dimensional radiative transfer code that has been successfully applied to study several Be systems so far, and the SINGLEBE code that solves the 1D viscous diffusion problem. We have computed models of the temporal evolution of different types of Be star disks for different dynamical scenarios. By showing the behaviour of a large number of observables (interferometry, polarization, photometry and spectral line profiles), we show how it is possible to infer from observations some key dynamical parameters of the disk.

Keywords

circumstellar matterradiative transferstars: emission-lineBe
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S272: Active OB stars: structure, evolution, mass loss, and critical limits , July 2010 , pp. 396 - 397
Copyright
Copyright © International Astronomical Union 2011

References

Carciofi, A. C. & Bjorkman, J. E. 2006, ApJ, 639, 1081CrossRefGoogle Scholar
Haubois, X., Carciofi, A. C., Bjorkman, J. E., & Okazaki, A. T., in preparationGoogle Scholar
Okazaki, A. T. 2007, in: Okazaki, A. T., Owocki, S. P., & Stefl, S. (eds.), Active OB-Stars: Laboratories for Stellar and Circumstellar Physics, ASP-CS 361, p. 230Google Scholar
Shakura, N. I. & Sunyaev, R. A. 1973, A&A, 24, 337Google Scholar