A more detailed look at the opacities for enriched carbon and oxygen mixtures.

We have included opacity tables in our stellar evolution code that enable us to model accurately the structure of stars composed of mixtures with carbon and oxygen independently enhanced relative to solar. We present tests to demonstrate the effects of the new tables. Two of these are practical examples: the effect on the evolution of a thermally pulsing asymptotic giant branch star and a Wolf–Rayet star. The changes are small but perceptible. [ABSTRACT FROM AUTHOR]