The influence of the explosion Mechanism on the Fe-group ejecta of core collapse supernovae

Abstract

Core collapse supernovae are responsible for at least half of the galactic inventory of Fe-group elements and probably for most of the Fe-group abundances seen in metal poor stars. Recent simulations show the emergence of a proton-rich ($Y_e>0.5$) region in the innermost ejected mass zones due to the neutrino interaction with matter. We explore the nucleosynthesis implications of these findings that result in enhanced abundances of ⁴⁵Sc, ⁴⁹Ti, and ⁶⁴Zn, which is consistent with chemical evolution studies and observations of low metallicity stars.