The pulsation properties of Procyon A

A grid of stellar evolution models for Procyon A has been calculated. These models include the best physics available to us (including the latest opac ities and equation of state) and are based on the revised astrometric mass of Girard et al. Models were calculated with helium diffusion and with the combined effects of helium and heavy-element diffusion. Oscillation frequen cies for I = 0, 1, 2, and 3 p-modes and the characteristic period spacing f or the g-modes were calculated for these models. We find that g-modes are s ensitive to model parameters that effect the structure of the core, such as convective core overshoot, the heavy-element abundance, and the evolutiona ry state (main sequence or shell hydrogen burning) of Procyon A. The p-mode s are relatively insensitive to the details of the physics used to model Pr ocyon A and only depend on the evolutionary state of Procyon A. Hence, obse rvations of p-mode frequencies on Procyon A will serve as a robust test of stellar evolution models.