Theoretical light and velocity curves for Cepheid variables

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Cepheid Variables, Light Curve, Velocity Distribution, Astronomical Models, Astrophysics, Stellar Evolution, Stellar Mass, Stellar Radiation

Scientific paper

A series of nonlinear Cepheid models were calculated with the DYN code. The models were used to extend to light curves the conclusion, based on velocity curves, that the observations of Cepheids cannot be matched unless the mass is significantly reduced (assuming a homogeneous composition). It is concluded that observed light curves are considerably more complex than previously thought. The light and velocity curves that were calculated should be useful guides for interpreting the observations.

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