A new equation of state with light nuclei and their weak interactions in core-collapse supernova simulations

Journal Article · Fri May 02 00:00:00 EDT 2014 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4874081· OSTI ID:22280472

Furusawa, Shun; Yamada, Shoichi ^[1]; Nagakura, Hiroki ^[2]; Sumiyoshi, Kohsuke ^[3]; Suzuki, Hideyuki ^[4]

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1. Waseda University, 3-4-1, Okubo, Shinjuku, Tokyo 169-8555 (Japan)
2. Yukawa Institute for Theoretical Physics, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo-ku, Kyoto, 606-8502 (Japan)
3. Numazu College of Technology, Ooka 3600, Numazu, Shizuoka 410-8501 (Japan)
4. Faculty of Science and Technology, Tokyo University of Science, Yamazaki 2641, Noda, Chiba 278-8510 (Japan)

We perform numerical experiments to investigate the influence of inelastic neutrino reactions with light nuclei on the standing accretion shock instability. The time evolutions of shock waves are calculated with a simple light-bulb approximation for the neutrino transport and a multi-nuclei equation of state. The neutrino absorptions and inelastic interactions with deuterons, tritons, helions and alpha particles are taken into account in the hydrodynamical simulations in addition to the ordinary charged-current interactions with nucleons. Axial symmetry is assumed but no equatorial symmetry is imposed. We show that the heating rates of deuterons reach as high as ∼ 10% of those of nucleons around the bottom of the gain region. On the other hands, alpha particles heat the matter near the shock wave, which is important when the shock wave expands and density and temperature of matter become low. It is also found that the models with heating by light nuclei have different evolutions from those without it in non-linear evolution phase. The matter in the gain region has various densities and temperatures and there appear regions that are locally rich in deuterons and alpha particles. These results indicate that the inelastic reactions of light nuclei, especially deuterons, should be incorporated in the simulations of core-collapse supernovae.

• OSTI ID: 22280472
• Journal Information: AIP Conference Proceedings, Vol. 1594, Issue 1; Conference: OMEG12: 12. international symposium on origin of matter and evolution of galaxies, Tsukuba (Japan), 18-21 Nov 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ALPHA PARTICLES
ASTROPHYSICS
AXIAL SYMMETRY
CHARGED-CURRENT INTERACTIONS
COMPUTERIZED SIMULATION
DEUTERONS
EQUATIONS OF STATE
GRAVITATIONAL COLLAPSE
LIGHT NUCLEI
NEUTRINO REACTIONS
NEUTRINOS
NONLINEAR PROBLEMS
NUCLEONS
STAR EVOLUTION
SUPERNOVAE
TRITONS
WEAK INTERACTIONS