Document Type
Article
Publication Date
11-1-1999
Publication Title
The Astrophysical Journal
Department
Department of Physics and Astronomy
Abstract
A grid of stellar evolution models for Procyon A has 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 Girard et al. 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 the characteristic period spacing for the g-modes were calculated for these models. We find that g-modes are sensitive to model parameters that effect the structure of the core, such as convective core overshoot, the heavy-element abundance, and the evolutionary state (main sequence or shell hydrogen burning) of Procyon A. The p-modes are relatively insensitive to the details of the physics used to model Procyon A and only depend on the evolutionary state of Procyon A. Hence, observations of p-mode frequencies on Procyon A will serve as a robust test of stellar evolution models.
DOI
10.1086/312336
Original Citation
Chaboyer B, Demarque P, Guenther DB. The Pulsation Properties of Procyon A. Astrophys J. 1999;525(1):L41-L44. doi:10.1086/312336
Dartmouth Digital Commons Citation
Chaboyer, Brian; Demarque, P.; and Guenther, D. B., "The Pulsation Properties of Procyon A" (1999). Dartmouth Scholarship. 2275.
https://digitalcommons.dartmouth.edu/facoa/2275
