Nucleosynthesis in Hot Bubbles of SNe-Origin of EMP Stars: HNe or SNe ?

Journal Article · Thu Aug 12 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3485159· OSTI ID:21439573

Izutani, Natsuko; Umeda, Hideyuki; Yoshida, Takashi

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 Y{sub e} 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 (Y{sub e} = 0.45-0.50) and proton-rich (Y{sub e} = 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.

• OSTI ID: 21439573
• Journal Information: AIP Conference Proceedings, Vol. 1269, Issue 1; Conference: OMEG-2010: 10. international symposium on origin of matter and evolution of galaxies, Osaka (Japan), 8-10 Mar 2010; Other Information: DOI: 10.1063/1.3485159; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COSMIC NEUTRONS
COSMIC NUCLEI
COSMIC PROTONS
ELEMENT ABUNDANCE
NEUTRINO REACTIONS
NEUTRON-DEFICIENT ISOTOPES
NEUTRON-RICH ISOTOPES
NUCLEOSYNTHESIS
SUPERNOVAE
ABUNDANCE
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BINARY STARS
COSMIC RADIATION
ELEMENTARY PARTICLES
ERUPTIVE VARIABLE STARS
FERMIONS
HADRONS
IONIZING RADIATIONS
ISOTOPES
LEPTON REACTIONS
NEUTRONS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
PRIMARY COSMIC RADIATION
PROTONS
RADIATIONS
RADIOISOTOPES
SECONDARY COSMIC RADIATION
STARS
SYNTHESIS
VARIABLE STARS