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

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

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.

本文言語English
ホスト出版物のタイトルOrigin of Matter and Evolution of Galaxies 2013 - Proceedings of the 12th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG 2013
出版社American Institute of Physics Inc.
ページ272-277
ページ数6
ISBN(印刷版)9780735412286
DOI
出版ステータスPublished - 2014
イベント12th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG 2013 - Tsukuba, Japan
継続期間: 2013 11 182013 11 21

出版物シリーズ

名前AIP Conference Proceedings
1594
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

Conference

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

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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