Mass loss from dynamically unstable stellar envelopes

Details Mass loss from dynamically unstable stellar envelopes Mass loss from dynamically unstable stellar envelopes

Jan 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...219..183t&link_type=abstract

Astrophysical Journal, Part 1, vol. 219, Jan. 1, 1978, p. 183-194.

Astronomy and Astrophysics

Astrophysics

72

Dynamic Stability, Hydrodynamics, Red Giant Stars, Stellar Envelopes, Stellar Mass Ejection, Stellar Models, Late Stars, Stellar Evolution, Stellar Luminosity, Stellar Temperature

Scientific paper

Results of an extensive study of the dynamical stability and dynamical behavior of envelopes of red giants are given. The region on the luminosity-effective temperature plane within which static, thermally equilibrated envelopes are dynamically unstable is reanalyzed and is found to be more complex than has hitherto been thought. The significance of the structure of this region and its dependence on relevant physical parameters is discussed. The motion of unstable envelopes is followed by a numerical hydrodynamical code; it is found that some small amount of mass loss occurs via a shock ejection mechanism as previously suggested in the literature. It is, however, also found that this mass loss does occur repeatedly, so that a rather large amount of mass loss is expected over an evolutionary time scale.

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