The lift of a mixed-up model.
Abstract
A nucleosynthesis code using an implicit differencing scheme to solve a linear system of equations was used to calculate the effect of different depths of mixing and different time scales on the C-12/C-13 abundance ratios and nitrogen abundance while a star is on the main sequence. Fast mixing can produce an abundance ratio in the range 10 to 20 only by mixing to a thin shell, and no deeper. Slow mixing increases slightly the size of the shell in which the C-13 is enhanced. Mixing below this shell causes significant enhancement of N-14.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- April 1977
- DOI:
- 10.1086/155142
- Bibcode:
- 1977ApJ...213..177D
- Keywords:
-
- Abundance;
- Convective Heat Transfer;
- Nuclear Fusion;
- Stellar Evolution;
- Stellar Models;
- Angular Momentum;
- Carbon Isotopes;
- Carbon 12;
- Carbon 13;
- Linear Equations;
- Mixing;
- Nitrogen Isotopes;
- Oxygen Isotopes;
- Oxygen 18;
- Astrophysics