Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...266..787s&link_type=abstract
Astrophysical Journal, Part 1, vol. 266, Mar. 15, 1983, p. 787-793.
Astronomy and Astrophysics
Astrophysics
44
Cepheid Variables, Light Curve, Stellar Oscillations, Fourier Analysis, Hydrodynamics, Phase Shift, Velocity Distribution
Scientific paper
Up until recently, no systematic description has existed of the structure of observed light and velocity curves which would allow quantitative techniques to be applied to a large sample of pulsating stars. A step in this direction was made by Simon and Lee (1981), who analyzed the light curves of 57 classical Cepheids. The present investigation is concerned with nonlinear hydrodynamic models of the classical Cepheid pulsators. The light and velocity curves generated by these models are subjected to Fourier decomposition. The observed and calculated variations are compared by matching the respective Fourier coefficients. It is found that the theoretical models have some serious defects in spite of apparent qualitative agremement in 'eyeball' comparisons between the observed light and velocity curves and their hydrodynamically modeled counterparts.
Davis Cecil G.
Simon Norman R.
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