The effect of massive binaries on stellar populations and supernova progenitors
arXiv:0711.3079 · doi:10.1111/j.1365-2966.2007.12738.x
Abstract
We compare our latest single and binary stellar model results from the Cambridge STARS code to several sets of observations. We examine four stellar population ratios, the number of blue to red supergiants, the number of Wolf-Rayet stars to O supergiants, the number of red supergiants to Wolf-Rayet stars and the relative number of Wolf-Rayet subtypes, WC to WN stars. These four ratios provide a quantitative measure of nuclear burning lifetimes and the importance of mass loss during various stages of the stars' lifetimes. In addition we compare our models to the relative rate of type Ib/c to type II supernovae to measure the amount of mass lost over the entire lives of all stars. We find reasonable agreement between the observationally inferred values and our predicted values by mixing single and binary star populations. However there is evidence that extra mass loss is required to improve the agreement further, to reduce the number of red supergiants and increase the number of Wolf-Rayet stars.
Accepted for publication in MNRAS, 11 pages, 10 figures
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- The death of massive stars - I. Observational constraints on the progenitors of type II-P supernovae
- The different progenitors of type Ib, Ic SNe, and of GRB
- The Stellar Ancestry of Supernovae in the Magellanic Clouds - I. the Most Recent Supernovae in the Large Magellanic Cloud
- Constraints on core-collapse supernova progenitors from correlations with H-alpha emission
- Rotation and massive close binary evolution
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- Evolutionary models of short-period soft X-ray transients: comparison with observations
- Developments in physics of massive stars