Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979ap%26ss..61..205a&link_type=abstract
Astrophysics and Space Science, vol. 61, no. 1, Mar. 1979, p. 205-215.
Astronomy and Astrophysics
Astrophysics
32
Fluctuation Theory, Mass Flow Rate, Stellar Mass Ejection, Thermodynamics, Hypotheses, Main Sequence Stars, Photosphere, Relaxation Time, Solar Granulation, Stellar Luminosity, Supergiant Stars, Thermodynamic Equilibrium
Scientific paper
A theory is developed that a mass flow from a star originates in a fluctuation about a quasi-equilibrium attained in the stellar atmosphere. Elements of Becker's (1961) thermodynamic fluctuation theory are incorporated into the problem of mass flows, so that a mass flow can be expressed in terms of perturbations of the quasi-equilibrium in the stellar photosphere. The perturbation is treated heuristically, and rms mass-loss rates are calculated for the sun as well as for supergiants, giants, and main-sequence stars of all normal spectral types. Comparison of the theoretical results with observational data indicates that the overall agreement is good with the possible exception of the late-type giants and supergiants.
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