Evolution of the chromospheres and winds of low- and intermediate-mass giant stars

Details Evolution of the chromospheres and winds of low- and intermediate-mass giant stars Evolution of the chromospheres and winds of low- and intermediate-mass giant stars

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...371..357j&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 371, April 10, 1991, p. 357-379.

Astronomy and Astrophysics

Astrophysics

114

Chromosphere, Giant Stars, Stellar Evolution, Stellar Winds, Asymptotic Giant Branch Stars, Radiative Transfer, Stellar Atmospheres, Stellar Mass Ejection, Thermodynamics

Scientific paper

Results are presented of an empirical analysis of the global thermodynamical requirements of the winds in the outer atmospheres of a representative sample of red giant stars of low- and intermediate-mass range. Results indicate that the mass-loss rates in these stars are not strongly dependent on the actual physical processes driving the winds. It is suggested that nonlinear processes act to regulate wind energy fluxes. Possible mechanisms responsible for the chromospheric heating and the mass loss in the low- and intermediate-mass giant stars are discussed.

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