Supernova Nucleosynthesis in the Early Universe

Details Supernova Nucleosynthesis in the Early Universe Supernova Nucleosynthesis in the Early Universe

2008-09-24

arxiv.org/abs/0809.4242v1

Astronomy and Astrophysics

Astrophysics

5 pages, 4 figures. To appear in "Low-Metallicity Star Formation: From the First Stars to Dwarf Galaxies", Proceedings of IAU

Scientific paper

10.1017/S1743921308024800

The first metal enrichment in the universe was made by supernova (SN) explosions of population (Pop) III stars. The trace remains in abundance patterns of extremely metal-poor (EMP) stars. We investigate the properties of nucleosynthesis in Pop III SNe by means of comparing their yields with the abundance patterns of the EMP stars. We focus on (1) jet-induced SNe with various energy deposition rates [$\dot{E}_{\rm dep}=(0.3-1500)\times10^{51}{\rm ergs s^{-1}}$], and (2) SNe of stars with various main-sequence masses ($M_{\rm ms}=13-50M_\odot$) and explosion energies [$E=(1-40)\times10^{51}$ergs]. The varieties of Pop III SNe can explain varieties of the EMP stars: (1) higher [C/Fe] for lower [Fe/H] and (2) trends of abundance ratios [X/Fe] against [Fe/H].

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