The Effect of Composition Changes on Evolutionary Tracks of Double-Shell Models
Abstract
Evolutionary tracks of double-shell stellar models are computed using a core-envelope fitting technique. Uncertainties in the continuous and molecular contributions to the mean opacity are investigated. A polynomial expression for the Rosseland mean cyanogen opacity is given. We find that variations in the carbon and oxygen abundances greatly affect the position of models in the H-R diagram, the effect being much larger for carbon stars than oxygen stars. Subject headings: abundances, stellar - carbon stars - interiors, stellar - stellar evolution
- Publication:
-
The Astrophysical Journal
- Pub Date:
- September 1975
- DOI:
- 10.1086/153837
- Bibcode:
- 1975ApJ...200..682S