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Dust Induced Dynamics of Circumstellar Shells around Long—Period Variables

Published online by Cambridge University Press:  15 February 2018

A. Gauger ,
A.J. Fleischer  and
E. Sedlmayr
A. Gauger
Affiliation:
Institut für Astronomie und Astrophysik, Berlin, Germany
A.J. Fleischer
Affiliation:
Institut für Astronomie und Astrophysik, Berlin, Germany
E. Sedlmayr
Affiliation:
Institut für Astronomie und Astrophysik, Berlin, Germany

Extract

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The presence of dust essentially affects the optical appearance and the dynamics of circumstellar shells around LPVs, while in turn the formation of solid particles as well as their properties critically depend on the actual local conditions. Thus, a reliable modelling of the structure and dynamics of such shells requires a detailed treatment of the dust complex.

In our hydrocode, which is described in more detail in Fleischer et al. (1992), the time evolution of the dust component is treated consistently by means of a moment method (Gauger et al. 1990). For the solution of the hydrodynamical and thermodynamical problem we essentially follow the approach of Bowen (1988), except for the shocks, which so far are assumed to be isothermal.

Type
Beyond the Classical Instability Strip
Information
International Astronomical Union Colloquium , Volume 139: New Perspectives on Stellar Pulsation and Pulsating Variable Stars , 1993 , pp. 206
Copyright
Copyright © Cambridge University Press 1993

References

Bowen, G.H., 1988, Astrophys.J. 329, 299 Google Scholar
Fleischer, A.J., Gauger, A., Sedlmayr, E., 1991, Astron. Astrophys., 242, L1 Google Scholar
Fleischer, A.J., , Gauger, A., Sedlmayr, E., 1992, Astron. Astrophys., in pressGoogle Scholar
Gauger, A., Gail, H.-P., Sedlmayr, E., 1990, Astron. Astrophys., 235, 345 Google Scholar