The influence of inelastic neutrino reactions with light nuclei on the standing accretion shock instability in core-collapse supernovae

Shun Furusawa, Hiroki Nagakura, Kohsuke Sumiyoshi, Shoichi Yamada

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

We perform numerical experiments to investigate the influence of inelastic neutrino reactions with light nuclei on the standing accretion shock instability (SASI). The time evolution of shock waves is 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, the effects of ordinary charged-current interactions with nucleons is addressed in the simulations. 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 hand, alpha particles are heated near the shock wave, which is important when the shock wave expands and the density and temperature of matter become low. It is also found that the models with heating by light nuclei evolve differently in the non-linear phase of SASI than do models that lack heating by light nuclei. This result is because matter in the gain region has a varying density and temperature and therefore sub-regions appear that are locally rich in deuterons and alpha particles. Although the light nuclei are never dominant heating sources and they work favorably for shock revival in some cases and unfavorably in other cases, they are non-negligible and warrant further investigation.

Original languageEnglish
Article number78
JournalAstrophysical Journal
Volume774
Issue number1
DOIs
Publication statusPublished - 2013 Sep 1

Keywords

  • equation of state
  • hydrodynamics
  • neutrinos
  • supernovae: general

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint Dive into the research topics of 'The influence of inelastic neutrino reactions with light nuclei on the standing accretion shock instability in core-collapse supernovae'. Together they form a unique fingerprint.

  • Cite this