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Title:
Evolution of the chromospheres and winds of low- and intermediate-mass giant stars
Authors:
Judge, P. G.; Stencel, R. E.
Affiliation:
AA(Joint Institute for Laboratory Astrophysics; Colorado, University, Boulder), AB(Colorado, University, Boulder)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 371, April 10, 1991, p. 357-379. (ApJ Homepage)
Publication Date:
04/1991
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Chromosphere, Giant Stars, Stellar Evolution, Stellar Winds, Asymptotic Giant Branch Stars, Radiative Transfer, Stellar Atmospheres, Stellar Mass Ejection, Thermodynamics
DOI:
10.1086/169897
Bibliographic Code:
1991ApJ...371..357J

Abstract

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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