The effect of turbulent pressure on the red giants and AGB stars
II. On the mechanism powering the strong stellar winds
S.Y. Jiang and
Received 24 January 1996 / Accepted 7 May 1996
A criterion for the occurrence of dynamical instability in the convective envelopes of red giants and AGB stars is presented. Using this criterion we find that the effect of turbulent pressure causes the dynamical instability in the regions very close to the sufaces of red giants and AGB stars, which affect the mass ejection outwards. This may be the mechanism powering the strong stellar winds of red giants and AGB stars with very low surface temperature and faint radiation pressure.
Key words: stars: AGB stars: mass loss instabilities
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© European Southern Observatory (ESO) 1997