Hydrodynamic models of a Cepheid atmosphere. III - Line spectrum and radius determinations

Details Hydrodynamic models of a Cepheid atmosphere. III - Line spectrum and radius determinations Hydrodynamic models of a Cepheid atmosphere. III - Line spectrum and radius determinations

Nov 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...201..641k&link_type=abstract

Astrophysical Journal, vol. 201, Nov. 1, 1975, pt. 1, p. 641-652.

Astronomy and Astrophysics

Astrophysics

70

Atmospheric Models, Cepheid Variables, Hydrodynamics, Line Spectra, Stellar Atmospheres, Astronomical Models, Atmospheric Turbulence, Radial Velocity, Stellar Luminosity, Stellar Spectra

Scientific paper

Line profiles are computed on the basis of the moving atmospheres from the hydrodynamic models investigated by Karp (1975). It is found that the velocity gradients in the atmosphere can be used to explain the apparent, slightly supersonic microturbulence. The total observed microturbulence is seen to be consistent with the linear sum of the classical microturbulence and that caused by the velocity gradients.

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