On radiative and convective influences on stellar pulsational stability

Recent theoretical investigations have shown that there is a delicate balance between instability and stability mechanisms in certain stars when physical influences, such as convection and radiative transfer, are considered in a finer detail than in a typical pulsation computation. Baker and Gough (1979) and Xiong (1980) demonstrated the susceptibility of pulsations to stabilization towards the red edge of the RR Lyrae and Cepheid instability strips by a convection-pulsation coupling. Moreover, Christensen-Dalsgaard and Frandsen (1983) have illustrated the stabilizing effect of radiative transfer when it is included consistently in the calculation of a solar model. Here we extend the calculations of Baker and Gough to Cepheids and the sun