Zentrum fuer Astronomie und Astrophysik,
Technische Universitaet Berlin, Germany
First Coauthor: Klaus-Peter Schroeder
Institute: Astronomy Centre, University of Sussex, Brighton, UK & Zentrum fuer Astronomie und Astrophysik, TU Berlin, Germany
Second Coauthor: Jan Martin Winters
Institute: Max-Planck-Institut fuer Radioastronomie, Bonn, Germany
Presenting Thesis: Yes
Subject Area: Stellar Evolution
Waveband: Other (Please Specify Below)
Technique: Computational Astrophysics
Other: none
Presentation: Poster Display
Title: An improved mass-loss description for dust-driven superwinds
Abstract: We consider the mass loss of stars during the final stages
of their evolution. Our mass loss description for the
tip-AGB is based on pulsating wind models in which the mass
loss is driven by radiation pressure on dust grains, for
C-rich chemistry. From a larger set of these models an
improved approximative formula has been derived which
depends on the stellar parameters, i.e. effective
temperature, luminosity and mass. The dependence of the mass
loss on the pulsational period has been taken into account
by applying an observed period-luminosity relation for
C-rich Miras. Due to the detailed consideration of the
chemistry and the physics of the dust nucleation and growth
processes, there is a strong dependence of the mass loss
rate on the effective temperature. This has not been
considered by mass loss descriptions used for earlier
studies of tip-AGB evolution and superwinds.