| Autor: |
Prantzos, N., Boissier, S., Prantzos, N., Boissier, S. |
| Zdroj: |
Astronomy and Astrophysics; July 2003, Vol. 406 Issue: 1 p259-264, 6p |
| Abstrakt: |
We show that the observed ratio $N_{\rm Ib,c}/N_{\rm II}$of the subtypes Ib,c and II core-collapse supernovae depends on the metallicity of the host galaxy, as expected on theoretical grounds. However, the observed relation differs considerably from expectations based on non-rotating models of single stars with mass loss. We argue that the predictions of recent models with rotation offer a much better agreement with observations, at least for progenitor stars with solar metallicity; calculations of models with higher and lower metallicities are required in order to substantiate these conclusions. We also suggest that systematic surveys of core collapse supernovae up to redshift $z\sim$1 with the SNAP satellite would allow to probe the effect of metallicity on supernovae properties during the past history of the Universe. |
| Databáze: |
Supplemental Index |
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