EAS Publications Series
Volume 35, 2009Interstellar Dust from Astronomical Observations to Fundamental Studies
|Page(s)||173 - 194|
|Published online||26 February 2009|
F. Boulanger, C. Joblin, A. Jones and S. Madden (eds)
EAS Publications Series, 35 (2009) 173-194
Dust Formation in Evolved Stars
Center of Astronomie, Institute for Theoretical Astrophysics, University of Heidelberg,
Albert-Überle-Str. 2, 69120 Heidelberg, Germany
All stars end through a phase where they form copious amounts of dust either in a stellar outflow or following explosive events. The most efficient dust factories seem to be stars that evolve through the Red Giant stage and form for several 105 yrs, dust in a cool stellar wind. The dust returned by them triggers the interstellar dust cycle and therefore is vital for the matter cycling in space. We discuss the theoretical basis for calculating the dust production by such stars. First, some elements of the theory of chemical equilibrium condensation calculations are presented and it is then discussed how the concept of activities can be used to also study non-equilibrium condensation. Then we discuss how dust particle growth in stellar winds can be calculated and which kind of input data are required for such calculations. Finally some results for dust production by AGB stars are discussed.
© EAS, EDP Sciences, 2009
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