<研究報告>rプロセス元素組成比パターンの起源

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Observational data of r-process elements in extremely metal-poor stars have strong impacts on understanding the origin of heavy elements. Recent increase of the observational data further clarifies that the abundance pattern of the r-process elements is universal, but in a limited region of the periodic table. This suggests that there are more than one sites for the r-process in supernova explosions. We show that the two scenarios of the r-process in prompt explosions and neutrino-driven winds in supernovae are viable. These scenarios may correspond to explosion mechanisms (prompt explosion and delayed explosion) depending on the mass of presupernova stars. We found that the r-process in neutrino-driven winds depends on the physical conditions of the outer region of the wind between proto-neutron star surface and shockwave. This implies the importance of quantitative study of the explosion mechanism via detailed numerical simulations with microphysics such as nuclear and neutrino physics.
沼津工業高等専門学校の論文
2003-01-31