The influence of turbulent pressure on the later stages of evolution of low- and intermediate-mass stars. (III). On the mechanism for driving strong stellar winds in red giant and AGB stars.

Details The influence of turbulent pressure on the later stages of evolution of low- and intermediate-mass stars. (III). On the mechanism for driving strong stellar winds in red giant and AGB stars. The influence of turbulent pressure on the later stages of evolution of low- and intermediate-mass stars. (III). On the mechanism for driving strong stellar winds in red giant and AGB stars.

Apr 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998acaps..18..148j&link_type=abstract

Acta Astrophys. Sin., Vol. 18, No. 2, p. 148 - 152

Astronomy and Astrophysics

Astrophysics

4

Stellar Evolution: Red Giants, Stellar Evolution: Agb Stars, Stellar Evolution: Turbulence, Stellar Winds: Red Giants, Stellar Winds: Agb Stars

Scientific paper

A criterion is presented for judging the occurrence or absence of dynamical instability in the convective envelope of a red giant or an AGB star. According to this criterion and the calculations for the evolution of 2.8 Msun and 7 Msun stars from the main sequence to the red giant stage and the AGB stage, it can be shown that the effect of turbulent pressure can cause a dynamical instability in the regions close to the surface of a red giant or an AGB star, leading to mass ejection outwards. This may be the mechanism for driving the strong stellar winds in red giants and AGB stars with very low surface temperature and feeble radiation pressure.

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