Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978afz....14..239f&link_type=abstract
(Astrofizika, vol. 14, May 1978, p. 239-256.) Astrophysics, vol. 14, no. 2, Dec. 1978, p. 135-145. Translation.
Astronomy and Astrophysics
Astrophysics
1
Shock Wave Propagation, Stellar Atmospheres, Stellar Models, Variable Stars, Cepheid Variables, Hertzsprung-Russell Diagram, Lagrange Coordinates, Pressure Gradients, Propagation Velocity, Shock Fronts, Stellar Luminosity
Scientific paper
An approximate model is used to analyze the density distribution established under the influence of periodic shock waves in a stellar atmosphere. The dependence of the gas density in a shock front passing through a stellar atmosphere on the coordinate of the front is examined, and a self-consistent problem of atmospheric expansion caused by periodic shock waves in a pulsating variable star is solved. Numerical results are obtained for different assumptions about the gas deexcitation rate behind a shock front. Observational data relating to the sizes of the atmospheres of pulsating variables are discussed and shown to indicate a considerable expansion of the atmospheres of such stars, which is attributed to the effect of periodic shock waves on the atmospheres.
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