ON NONLINEAR RADIAL OSCILLATIONS IN CONVECTIVE RR LYRAE STARS .3. A FULL-AMPLITUDE INVESTIGATION OF THE RED EDGE

An adaptive-grid algorithm is employed to construct a sequence of conv ective RR Lyrae envelopes with varying effective temperatures. For the first time, the theoretical red edge is derived and analyzed from ful l-amplitude models. ''Convective quenching'' is confirmed as the mecha nism that stalls the pulsational driving when the red edge is approach ed from within the instability strip. It is demonstrated that the theo retical properties of this approach are qualitatively consistent with the empirical properties. A quantitative comparison, however, depends strongly on details of the convection model.