229 citations · 1.6k across the 17 of their papers we have counts for
17 papers
Stochastic Chemical Evolution of Galactic Subhalos and the Origin of r-Process Elements
Takuya Ojima, Yuhri Ishimaru, Shinya Wanajo +2
Mergers of compact binaries (of a neutron star and another neutron star or a black hole, NSMs) are suggested to be the promising astrophysical site of the r-process. While the aver…
Enrichment of Zinc in galactic chemodynamical evolution models
Yutaka Hirai, Takayuki R. Saitoh, Yuhri Ishimaru +1
The heaviest iron-peak element, Zn has been used as an important tracer of cosmic chemical evolution. Spectroscopic observations of the metal-poor stars in Local Group galaxies sho…
Diversity of Abundance Patterns of Light Neutron-capture Elements in Very-metal-poor Stars
Misa Aoki, Yuhri Ishimaru, Wako Aoki +1
We determine the abundances of neutron-capture elements from Sr to Eu for five very-metal-poor stars (-3<[Fe/H]<-2) in the Milky Way halo to reveal the origin of light neutron-capt…
Early chemo-dynamical evolution of dwarf galaxies deduced from enrichment of r-process elements
Yutaka Hirai, Yuhri Ishimaru, Takayuki R. Saitoh +3
The abundance of elements synthesized by the rapid neutron-capture process (r-process elements) of extremely metal-poor (EMP) stars in the Local Group galaxies gives us clues to cl…
Enrichment of r-process elements in dwarf spheroidal galaxies in chemo-dynamical evolution model
Yutaka Hirai, Yuhri Ishimaru, Takayuki R. Saitoh +3
The rapid neutron-capture process (r-process) is a major process to synthesize elements heavier than iron, but the astrophysical site(s) of r-process is not identified yet. Neutron…
Neutron Star Mergers as the Origin of r-Process Elements in the Galactic Halo Based on the Sub-halo Clustering Scenario
Yuhri Ishimaru, Shinya Wanajo, Nikos Prantzos
Binary mergers (NSMs) of double neutron star (and black hole-neutron star) systems are suggested to be major sites of r-process elements in the Galaxy by recent hydrodynamical and…