우주 물질 연구소(국문 홈페이지)

We calculate Galactic Chemical Evolution (GCE) of Mo and Ru by taking into account the contribution from -process nucleosynthesis. We estimate yields of -nuclei such as  and  through the -process in various supernova (SN) progenitors based upon recent models. In particular, the -process in energetic hypernovae produces a large amount of -nuclei compared to the yield in ordinary core-collapse SNe. Because of this the abundances of  and  in the Galaxy are significantly enhanced at [Fe/H]=0 by the -process. We find that the -process in hypernovae is the main contributor to the elemental abundance of Mo at low metallicity [Fe/H. Our theoretical prediction of the elemental abundances in metal-poor stars becomes more consistent with observational data when the -process in hypernovae is taken into account.