Supernova Nucleosynthesis and Extremely Metal-Poor Stars

We investigate hydrodynamical and nucleosynthetic properties of the jet-induced explosion of a population III $40M_{\odot }$ star and compare the abundance patterns of the yields with those of the metal-poor stars. We conclude that (1) the ejection of Fe-peak products and the fallback of unprocessed materials can account for the abundance patterns of the extremely metal-poor (EMP) stars and that (2) the jet-induced explosion with different energy deposition rates can explain the diversity of the abundance patterns of the metal-poor stars. Furthermore, the abundance distribution after the explosion and the angular dependence of the yield are shown for the models with high and low energy deposition rates $\dot{E}_{\rm dep}=120\times10^{51} {\rm ergs s^{-1}}$and$1.5\times10^{51} {\rm ergs s^{-1}}$. We also find that the peculiar abundance pattern of a Si-deficient metal-poor star HE 1424–0241 can be reproduced by the angle-delimited yield for $\theta ={30}^{\circ }-{35}^{\circ }$ of the model with ${\dot{E}}_{\mathrm{d}\mathrm{e}\mathrm{p}}=120\times {10}^{51}\mathrm{e}\mathrm{r}\mathrm{g}\mathrm{s}{\mathrm{s}}^{-1}$.