Fluctuation theory of the mass flux from the stars - Amplifications

Details Fluctuation theory of the mass flux from the stars - Amplifications Fluctuation theory of the mass flux from the stars - Amplifications

Feb 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980ap%26ss..67..461a&link_type=abstract

Astrophysics and Space Science, vol. 67, no. 2, Feb. 1980, p. 461-468.

Astronomy and Astrophysics

Astrophysics

11

Fluctuation Theory, Late Stars, Mass Flow Rate, Photosphere, Stellar Atmospheres, Stellar Mass Ejection, Average, Root-Mean-Square Errors, Stochastic Processes, Supergiant Stars

Scientific paper

Two critical points in an earlier paper (Andriesse, 1979) on this theory are further discussed. The first is related to the physical average of the stochastic force driving the mass flux. A more accurate estimate has been made of the mean mass loss, viz. 0.40 times the 3/2 power of the luminosity, times the 9/4 power of the radius/mass ratio, divided by the 7/4 power of the gravitational constant. The second has to do with the upper limit to the mass loss, which is considered in terms of the postulate of equipartition of thermal power and mechanical power in the photosphere. This equipartition seems to be reached in stars of spectral type earlier than G8. Only for these stars the above mass loss formula is valid.

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