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| Paper: |
The Evolution of Procyon A |
| Volume: |
135, A Half Century of Stellar Pulsation Interpretations: a Tribute to Arthur N. Cox |
| Page: |
67 |
| Authors: |
Chaboyer, B.; Demarque, P.; Guenther, D. B. |
| Abstract: |
A grid of stellar evolution models for Procyon A have been calculated. These models include the best physics available to us (including the latest opacities and equation of state) and are based on the revised astrometric mass of Girrard et al. (1996, BAAS, 28, 919). The long standing descrepency between the evolutionary mass and the astometric mass is now resolved, a result of the newly determined astrometric mass. Models were calculated with helium diffusion and with the combined effects of helium and heavy element diffusion. Oscillation frequencies for l=0,1,2 and 3 p-modes (and g-modes) were calculated for these models, and we discuss how future obsevations of p-modes in Procyon may be used to constrain the stellar evolution models and the evolutionary stage of Procyon A. |
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