Explosive nucleosynthesis in a neutrino-driven core collapse supernova

Journal Article · Tue Jun 01 04:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3455922· OSTI ID:21362095

Fujimoto, Shin-ichiro ^[1]; Kotake, Kei ^[2]; Hashimoto, Masa-aki; Ono, Masaomi ^[3]; Ohnishi, Naofumi ^[4]

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1. Kumamoto National College of Technology, 2659-2 Suya, Nishigoshi, Kikuchi, Kumamoto 861-1102 (Japan)
2. Division of Theoretical Astronomy, National Astronomical Observatory Japan, 2-21-1, Osawa, Mitaka, Tokyo, 181-8588 (Japan)
3. Department of Physics, School of Sciences, Kyushu University, Fukuoka 810-8560 (Japan)
4. Department of Aerospace Engineering, Tohoku University, 6-6-01 Aramaki-Aza-Aoba, Aoba-ku, Sendai, 980-8579 (Japan)

We investigate explosive nucleosynthesis in a delayed neutrino-driven, supernova explosion aided by standing accretion shock instability (SASI), based on two-dimensional hydrodynamic simulations of the explosion of a 15 M{sub c}entre dot star. We take into accounts neutrino heating and cooling as well as change in electron fraction due to weak interactions appropriately, in the two-dimensional simulations. We assume the isotropic emission of neutrinos from the neutrino spheres with given luminosities. and the Fermi-Dirac distribution of given temperatures. We find that the stalled shock revives due to the neutrino heating aided by SASI for cases with L{sub n}u{sub e}>=3.9x10{sup 52}ergss{sup -1} and the as-pherical shock passes through the outer layers of the star (>=10,000 km), with the explosion energies of approx10{sup 51}ergs.Next we examine abundances and masses of the supernova ejecta. We find that masses of the ejecta and {sup 56}Ni correlate with the neutrino luminosity, and {sup 56}Ni mass is comparable to that observed in SN 1987A. We also find that abundance pattern of the supernova ejecta is similar to that of the solar system, for cases with high explosion energies of >10{sup 51}ergs. We emphasize that {sup 64}Zn, which is underproduced in the spherical case, is abundantly produced in slightly neutron-rich ejecta.

• OSTI ID: 21362095
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1238; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ABUNDANCE
BARYONS
BASIC INTERACTIONS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BINARY STARS
CHEMICAL ANALYSIS
COOLING
DAYS LIVING RADIOISOTOPES
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
ERUPTIVE VARIABLE STARS
EVEN-EVEN NUCLEI
EXPLOSIONS
FERMIONS
HADRONS
HEATING
INTERACTIONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
LEPTONS
LUMINOSITY
MASSLESS PARTICLES
NEUTRINOS
NEUTRONS
NICKEL 56
NICKEL ISOTOPES
NUCLEI
NUCLEONS
NUCLEOSYNTHESIS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIOISOTOPES
SHOCK WAVES
SIMULATION
SOLAR SYSTEM
STABLE ISOTOPES
STARS
SUPERNOVAE
SYNTHESIS
TWO-DIMENSIONAL CALCULATIONS
VARIABLE STARS
WEAK INTERACTIONS
ZINC 64
ZINC ISOTOPES