2021/02/11 by Yuta Yamazaki, Toshitaka Kajino, Yamazaki, Yuta +10 · 1 citation
Physics and Astronomy · #Astro and Planetary Science #Gamma-ray bursts and supernovae #Nuclear physics research studies #astro-ph.GA
paper · pdf · doi:10.48550/arxiv.2102.05891
arxiv created 2021/02/11 · arxiv updated 2021/02/12
We study the evolution of rapid neutron-capture process (r-process) isotopes in the Galaxy. We analyze relative contributions from core collapse supernovae (CCSNe), neutron star mergers (NSMs) and collapsars under a range of astrophysical conditions and nuclear input data. Although the r-process in each of these sites can lead to similar (or differing) isotopic abundances, our simulations reveal that the early contribution of r-process material to the Galaxy was dominated by CCSNe and collapsar r-process nucleosynthesis, while the NSM contribution is unavoidably delayed even under the assumption of the shortest possible minimum merger time.