Some properties of model stars in thermal equilibrium

Details Some properties of model stars in thermal equilibrium Some properties of model stars in thermal equilibrium

Dec 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980azh....57.1266t&link_type=abstract

(Astronomicheskii Zhurnal, vol. 57, Nov.-Dec. 1980, p. 1266-1272.) Soviet Astronomy, vol. 24, Nov.-Dec. 1980, p. 729-733. Trans

Astronomy and Astrophysics

Astronomy

4

Hertzsprung-Russell Diagram, Star Distribution, Stellar Envelopes, Stellar Evolution, Stellar Models, Supergiant Stars, Thermodynamic Equilibrium, Chemical Composition, Helium, Hydrogen, Stellar Luminosity, Stellar Temperature

Scientific paper

Model stars in thermal equilibrium with 6, 10, 16, 32, and 64 solar masses and with hydrogen and helium distributions due to evolution are developed. It is shown that models with distributions following the Schwarzschild criterion of convective stability cannot explain the position of the blue boundary of the region of supergiants on the H-R diagram. In addition, it is found that an external radiation flux exceeding the star's own emission flux produces an increase in the temperature of the envelope with almost no change in the radius and intrinsic luminosity of the star. When the model has a constant boundary temperature, the imposition of an external pressure leads to the appearance of a convective envelope.

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