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The r-Process in the Proto-Neutron-Star Winds with Anisotropic Neutrino Emission
Shinya Wanajo
The astrophysical origin of the r-process nuclei is still unknown. Even the most promising scenario, the neutrino-driven winds from a nascent neutron star, encounters severe diffic…
Neutron-capture elements in the very metal-poor star HD122563
S. Honda, W. Aoki, Y. Ishimaru +2
We obtained high resolution, high S/N spectroscopy for the very metal-poor star HD122563 with the Subaru Telescope High Dispersion Spectrograph. Previous studies have shown that th…
The rp-Process in Neutrino-driven Winds
Shinya Wanajo
Recent hydrodynamic simulations of core-collapse supernovae with accurate neutrino transport suggest that the bulk of the early neutrino-heated ejecta is proton rich, in which the…
Light Element Production in the Circumstellar Matter of Energetic Type Ic Supernovae
Ko Nakamura, Susumu Inoue, Shinya Wanajo +1
We investigate energetic type Ic supernovae as production sites for Li6 and Be in the early stages of the Milky Way. Recent observations have revealed that some very metal-poor sta…