Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....84...93s&link_type=abstract
Astronomy and Astrophysics, vol. 84, no. 1-2, Apr. 1980, p. 93-95.
Astronomy and Astrophysics
Astrophysics
9
Acoustic Excitation, Atmospheric Heating, Atmospheric Models, Chromosphere, Dwarf Stars, Late Stars, Atmospheric Temperature, Stellar Gravitation, Stellar Temperature
Scientific paper
Theoretical chromosphere models for five late type dwarf stars have been computed with the acoustic heating theory on the basis of the Lighthill-Proudman and mixing length theories. For stars of effective temperature greater than 5200 K good agreement is found between empirical and theoretical positions of the temperature minima as well as between the semiempirical chromospheric radiation flux and the acoustic flux at the temperature minimum. This supports the validity of the acoustic heating theory. A considerable discrepancy is however found for late type dwarf stars where acoustic flux is clearly missing. This however does not indicate that the acoustic heating theory is wrong but that the theory of acoustic energy production is insufficient for these stars.
Schmitz Felix
Ulmschneider Peter
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