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C. Frohlich, F.-K. Thielemann (University of Basel), G. Martinez-Pinedo (IEEC/ICREA), M. Liebendoerfer (CITA, University of Toronto)
Core collapse supernovae are responsible for at least half of the galactic inventory of Fe-group elements and probabely for most of the Fe-group abundances seen in metal poor stars. Recent simulations show the appearance of a proton-rich (Ye > 0.5) region in the ejected matter. We explore the nucleosynthesis implications of Ye > 0.5 in a framework that accomodates a consistently emerging mass cut between the neutron star and the ejected matter, and a consistent treatment of all weak interactions. We find that the proton-rich environment results in enhanced abundances of 45Sc, 49Ti, 64Zn, which is consistent with chemical evolution studies and observations of low metallicity stars.
This work was supported by SNF grant 2000-068031.
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Bulletin of the American Astronomical Society, 37 #2
© 2005. The American Astronomical Soceity.