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

Shun Furusawa, Hiroki Nagakura, Kohsuke Sumiyoshi, Shoichi Yamada, Hideyuki Suzuki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationOrigin of Matter and Evolution of Galaxies 2013 - Proceedings of the 12th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG 2013
PublisherAmerican Institute of Physics Inc.
Pages272-277
Number of pages6
ISBN (Print)9780735412286
DOIs
Publication statusPublished - 2014 Jan 1
Event12th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG 2013 - Tsukuba, Japan
Duration: 2013 Nov 182013 Nov 21

Publication series

NameAIP Conference Proceedings
Volume1594
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference12th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG 2013
CountryJapan
CityTsukuba
Period13/11/1813/11/21

Keywords

  • equation of state
  • hydrodynamics
  • neutrinos
  • supernovae

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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