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Dust distribution in circumstellar shells

Published online by Cambridge University Press:  30 August 2012

Allard-Jan van Marle ,
Zakaria Meliani ,
Rony Keppens  and
Leen Decin
Allard-Jan van Marle
Affiliation:
Centre for Plasma Astrophysics, K.U.Leuven, Celestijnenlaan 200B, 3001 Leuven, Belgium
Zakaria Meliani
Affiliation:
Centre for Plasma Astrophysics, K.U.Leuven, Celestijnenlaan 200B, 3001 Leuven, Belgium
Rony Keppens
Affiliation:
Centre for Plasma Astrophysics, K.U.Leuven, Celestijnenlaan 200B, 3001 Leuven, Belgium
Leen Decin
Affiliation:
Institute of Astronomy, K.U.Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
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Abstract

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We present numerical simulations of the hydrodynamical interactions that produce circumstellar shells. These simulations include several scenarios, such as wind-wind interaction and wind-ISM collisions. In our calculations we have taken into account the presence of dust in the stellar wind. Our results show that, while small dust grains tend to be strongly coupled to the gas, large dust grains are only weakly coupled. As a result, the distribution of the large dust grains is not representative of the gas distribution. Combining these results with observations may give us a new way of validating hydrodynamical models of the circumstellar medium.

Keywords

hydrodynamicsmethods: numericalstars: AGB and post-AGBstars: windsoutflowsISM: kinematics and dynamicsinfrared: ISMcircumstellar matter
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S283: Planetary Nebulae: An Eye to the Future , July 2011 , pp. 516 - 517
Copyright
Copyright © International Astronomical Union 2012

References

Keppens, R., Meliani, Z., van Marle, A. J., Delmont, P., Vlasis, A., & van der Holst, B. 2011, J. Comput. Phys. doi:10.1016/j.jcp.2011.01.020 CrossRefGoogle Scholar
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van Marle, A. J., Meliani, Z., Keppens, R., & Decin, L 2011, ApJL 734, L26 CrossRefGoogle Scholar