On winds from giants in binary systems

Details On winds from giants in binary systems On winds from giants in binary systems

Feb 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001a%26a...367..513f&link_type=abstract

Astronomy and Astrophysics, v.367, p.513-520 (2001)

Astronomy and Astrophysics

Astrophysics

19

Binaries: General, Stars: Mass-Loss, Stars: Late-Type, Stars: Agb And Post-Agb

Scientific paper

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 (T_eff, 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.

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