- 著者
-
梅村 雅之
森 正夫
Takanobu Kirihara
Kenji Hasegawa
Masayuki UMEMURA
Masao MORI
Tomoaki Ishiyama
- 出版者
- Oxford University Press
- 雑誌
- Monthly Notices of the Royal Astronomical Society (ISSN:00358711)
- 巻号頁・発行日
- vol.491, no.3, pp.4387-4395, 2019-12
We investigate the distribution of metals in the cosmological volume at z ∼ 3, in particular, provided by massive Population III (Pop III) stars using a cosmological N-body simulation in which a model of Pop III star formation is implemented. Owing to the simulation, we can choose minihaloes where Pop III star formation occurs at z > 10 and obtain the spatial distribution of the metals at lower redshifts. To evaluate the amount of heavy elements provided by Pop III stars, we consider metal yield of pair-instability or core-collapse supernovae (SNe) explosions of massive stars. By comparing our results to the Illustris-1 simulation, we find that heavy elements provided by Pop III stars often dominate those from galaxies in low-density regions. The median value of the volume averaged metallicity is Z∼10−4.5−−2Z⊙ at the regions. Spectroscopic observations with the next generation telescopes are expected to detect the metals imprinted on quasar spectra.