Physics – Nuclear Physics
Scientific paper
Aug 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1269..342i&link_type=abstract
THE 10TH INTERNATIONAL SYMPOSIUM ON ORIGIN OF MATTER AND EVOLUTION OF GALAXIES: OMEG-2010. AIP Conference Proceedings, Volume 1
Physics
Nuclear Physics
Nucleosynthesis, Neutron-Proton Interactions, Supernovae, Stellar Structure, Interiors, Evolution, Nucleosynthesis, Ages, Mass And Neutron Distributions, Nuclear Physics Aspects Of Novae, Supernovae, And Other Explosive Environments
Scientific paper
The observational trends of extremely metal-poor (EMP) stars reflect SN nucleosynthesis of Population III, or almost metal-free stars. The observation of EMP stars can be reproduced by HNe, not by normal SNe. However, if the innermost neutron-rich or proton-rich matter is ejected, the abundance patterns of ejected matter are changed, and there is a possibility that normal SNe can also reproduce the observations of EMP stars. In this paper, we calculate nucleosynthesis with various Ye and entropy taking into account neutrino processes. We investigate whether normal SNe with this innermost matter can reproduce the observations of EMP stars. We find that neutron-rich (Ye = 0.45-0.50) and proton-rich (Ye = 0.51-0.55) matters can improve Zn and Co, but tend to overproduce other Fe-peak elements. On the other hand, HNe can naturally reproduce the observations of EMP stars.
Izutani Natsuko
Umeda Hideyuki
Yoshida Takashi
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