2018MNRAS.479..495G -
Mon. Not. R. Astron. Soc., 479, 495-516 (2018/September-1)
Nucleosynthesis in primordial hypernovae.
GRIMMETT J.J., HEGER A., KARAKAS A.I. and MULLER B.
Abstract (from CDS):
We investigate the relationship between explosion energy and nucleosynthesis in Population III supernovae and provide nucleosynthetic results for the explosions of stars with progenitor masses of 15 M☉, 20 M☉, 30 M☉, 40 M☉, 60 M☉, and 80 M☉, and explosion energies between approximately 1050 erg and 1053 erg. We find that the typical abundance pattern observed in metal-poor stars is best matched by supernovae with progenitor mass in the range 15 M☉- 30 M☉ and explosion energy of ∼(5-10) x 1051 erg. In these models, a reverse shock caused by jumps in density between shells of different composition serves to decrease synthesis of chromium and manganese, which is favourable to matching the observed abundances in metal-poor stars. Spherically symmetric explosions of our models with progenitor mass >=40 M☉ do not provide yields that are compatible with the iron-peak abundances that are typically observed in metal-poor stars; however, by approximating the yields that we might expect from these models in highly aspherical explosions, we find indications that explosions of stars 40 M☉ - 80 M☉ with bipolar jets may be good candidates for the enrichment sources of metal-poor stars with enhanced carbon abundances.
Abstract Copyright:
© 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society
Journal keyword(s):
supernovae: general - nucleosynthesis, abundances - early Universe
Status at CDS
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Simbad objects:
5
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