Explosive nucleosynthesis in SN 1987A. II - Composition, radioactivities, and the neutron star mass

摘要: The 20 solar mass model of Nomoto and Hashimoto (1988) is utilized with a 6 mass. He core used to perform explosive nucleosynthesis calculations. employed explosion energy 10 the 51st ergs lies within uncertainty range inferred from bolometric light curve. processes their burning products are discussed in detail. results compared abundances IR observations SN 1987A average expected for Type II supernovae Galactic chemical evolution. long-lived radioactive nuclei importance late curve gamma-ray predicted. position cut between neutron star ejecta deduced total amount ejected Ni-56. This requires baryonic 1.6 + or - 0.045 mass, which corresponds gravitational 1.43 0.05 after subtracting binding nonrotating star. 135 refs.