Speaker
Description
Carbon-oxygen (C-O) shell mergers in the late evolutionary stages of massive stars play a crucial role in determining their final fate and have a significant impact on the pre-supernova and explosive nucleosynthesis. In this talk, I will explore the complex dynamics within C-O shells, and how these interactions drive the production of intermediate and heavy elements. In particular I will address how stellar models experiencing a C-O shell merger can efficiently produce odd-Z nuclei such as P, Cl, K, and Sc, and heavy $\alpha$-elements, as Si, S, and Ar. I will then outline how recent observations of extremely metal poor (EMP) stars and supernova remnants (SNR) would suggest the presence of these events in all the generations of massive stars.