Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...277..578d&link_type=abstract
Astronomy and Astrophysics, Vol. 277, p. 578 (1993)
Astronomy and Astrophysics
Astrophysics
44
Dust - Interplanetary Medium - Stars: Circumstellar Matter - Stars: Late Type
Scientific paper
The grains found in interstellar and interplanetary space are well known to often be of amorphous heterogeneous structure. Nevertheless a quantitative theory for the description of the growth of these particles is still missing. We show that the well known moment method for the calculation of dust grain formation can be generalized in order to account also for the formation of heterogeneous dust grains. These include both grains consisting of a mixture of different molecules and the so-called core-mantle grains where different materials condense in layers on the grains. Furthermore we construct a special equilibrium state that allows for the calculation of equilibrium densities of various molecules above composite grain materials. The new equations are applied to dust condensation in the wind of an M giant star.
Dominik Carsten
Gail Hans-Peter
Sedlmayr Erwin
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