(1) Space System Dept., Fujitsu Ltd., Nakase 1-chome, Mihama-ku, 261 Chiba, Japan;(2) Nishi-Harima Astronomical Observatory, Ohnadesan, Sayo-cho, 679-53 Hyogo, Japan;(3) Astronomical Institute, Tóhoku University, 980 Sendai, Japan
Abstract:
The second order theory of coupling is discussed regarding the radial pulsation of stellar models which are constructed ignoring convection. The formula including the nonadiabatic effect is presented. Numerical values given for model classical cepheids are considerably greater than the adiabatic values.