Volume 367, Number 2, February IV 2001
|Page(s)||513 - 520|
|Section||Interstellar and circumstellar matter|
|Published online||15 February 2001|
On winds from giants in binary systems
Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, Rabiańska 8, 87-100 Toruń, Poland
Corresponding author: A. Frankowski, firstname.lastname@example.org
Accepted: 4 December 2000
We explore the influence of a companion on the wind from a giant in a binary system. We have developed a simple method for estimating the enhancement and intrinsic non-sphericity of the outflow in this case. Assuming the Roche model (modified to account for the reduced effective gravity of the giant), local stellar parameters (Teff, g) are calculated. This, according to our approach, allows to derive the local mass loss rate. The influence of varying the model parameters on the results is studied. A relation between the ratio of the stellar radius to the Roche lobe radius and the overall wind enhancement is obtained both numerically and in an analytical approximation. A similar relation is derived for the equatorial-to-polar wind intensity contrast.
Key words: binaries: general / stars: mass-loss / stars: late-type / stars: AGB and post-AGB
© ESO, 2001
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