Query : 2003A&A...400..981A

2003A&A...400..981A - Astronomy and Astrophysics, volume 400, 981-992 (2003/3-4)

Dust formation in winds of long-period variables. V. The influence of micro-physical dust properties in carbon stars.


Abstract (from CDS):

We present self-consistent dynamical models for dust-driven winds of carbon-rich AGB stars. The models are based on the coupled system of frequency-dependent radiation hydrodynamics and time-dependent dust formation. We investigate in detail how the wind properties of the models are influenced by the micro-physical properties of the dust grains that are required by the description of grain formation. The choice of dust parameters is significant for the derived outflow velocities, the degrees of condensation and the resulting mass-loss rates of the models. In the transition region between models with and without mass-loss the choice of micro-physical parameters turns out to be very significant for whether a particular set of stellar parameters will give rise to a dust-driven mass-loss or not. We also calculate near-infrared colors to test how the dust parameters influence the observable properties of the models, however, at this point we do not attempt to fit particular stars.

Abstract Copyright:

Journal keyword(s): hydrodynamics - radiative transfer - stars: mass-loss - stars: atmospheres - stars: carbon - stars: AGB, post-AGB

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
1 V* R For C* 02 29 15.3077617632 -26 05 55.646585700   12.94 7.50     C4,3e 188 0
2 V* R Lep C* 04 59 36.3486921120 -14 48 22.502479140 15.06 13.51 7.76 4.90 3.42 C7,6e 326 0
3 V* R Vol C* 07 05 36.2081474688 -73 00 52.034502960   14.24 8.70     Ce 81 0

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