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| Paper: |
Contribution of Very Massive Population III Stars to the Chemical Enrichment |
| Volume: |
458, Galactic Archaeology: Near-Field Cosmology and the Formation of the Milky Way |
| Page: |
51 |
| Authors: |
Yokoyama, T.; Tominaga, N. |
| Abstract: |
The first chemical enrichment has been made by supernovae (SNe) of
metal-free Population (Pop) III stars. The first generation stars
predicted to be as massive as >300 M☉.
Although such very massive stars (VMSs) had been considered to
directly collapse to black holes, the VMSs are suggested to be able
to explode as gamma-ray bursts (GRBs).
In order to clarify whether such VMSs can contribute to the chemical enrichment,
we present explosive nucleosynthesis in VMS explosions and compare
the abundance patterns of their yields with those of the extremely metal-poor (EMP) stars.
It is shown that the yields of VMS explosions with explosion energy
of 6.3 × 1054 erg cannot reproduce [C/Fe], [Mg/Fe], and [Zn/Fe] simultaneously.
This implies that the VMSs are likely not to dominantly contribute
to the chemical enrichment in the early universe. |
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