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Faint Population III supernovae as the origin of the most iron-poor stars
Miho N. Ishigaki, Nozomu Tominaga, Chiaki Kobayashi +1
The most iron-deficient stars in the Milky Way provide important observational constraints on the nature of astrophysical objects that have enriched the primordial gas with heavy e…
The origin of low [alpha/Fe] ratios in extremely metal-poor stars
Chiaki Kobayashi, Miho N. Ishigaki, Nozomu Tominaga +1
We show that the low ratios of elements (Mg, Si, and Ca) to Fe recently found for a small fraction of extremely metal-poor stars can be naturally explained with the nucleosynth…
Chemical compositions of six metal-poor stars in the ultra-faint dwarf spheroidal galaxy Boötes I
Miho N. Ishigaki, Wako Aoki, Nobuo Arimoto +1
Ultra-faint dwarf galaxies recently discovered around the Milky Way (MW) contain extremely metal-poor stars, and might represent the building blocks of low-metallicity components o…