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| Paper: |
Oxygen-enhanced horizontal branch models and RR Lyrae pulsation |
| Volume: |
11, Confrontation Between Stellar Pulsation and Evolution |
| Page: |
150 |
| Authors: |
Dorman, Ben |
| Abstract: |
The effect of higher than solar oxygen-to-iron abundance ratios on horizontal branch stellar evolution is reviewed. It is found that the evolutionary masses of pulsating stars may be reduced quite significantly as a result of changes in nucleosynthesis resulting from higher CNO abundance, whereas an increase in the opacity alone causes much smaller changes in the mass at fixed color. The implications of the results for the forthcoming revision in metal opacities in a narrow range of stellar envelope temperatures are discussed. |
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