Axisymmetric neutrino radiation and the mechanism of supernova explosions

Tetsuya Shimizu, Shoichi Yamada, Katsuhiko Sato

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

Numerical simulations of convection in the supernova core were carried out in which axisymmetrically modified neutrino radiation from a rotating proto-neutron star was assumed. Since neutrinos heat up matter around the rotational axis more intensively than around the equatorial plane, powerful and global convection of matter between the shock front and the proto-neutron star is induced, and, moreover, jetlike motion along the axis pushes the shock front into the prolate form. It is found that the hot bubble is distorted as a result of this quadrupolar convective motion and consequently that turbulent instability occurs behind the shock wave. This instability is considered to provide the initial fluctuation of Rayleigh-Taylor instability in the envelope, the seed of matter mixing in SN 1987A. We also found that three outstanding problems, namely, the seed of matter mixing, the high-velocity component of mixed elements, and observed asymmetry in the envelopes, can be explained simultaneously by those effects. Based on these results, we propose a new, possible scenario for the explosion mechanism.

Original languageEnglish
JournalAstrophysical Journal
Volume432
Issue number2 PART 2
Publication statusPublished - 1994 Sep 10
Externally publishedYes

Fingerprint

supernovae
explosions
explosion
neutrinos
shock fronts
radiation
convection
neutron stars
seed
seeds
envelopes
shock wave
bubble
Taylor instability
asymmetry
shock waves
bubbles
heat
simulation
effect

Keywords

  • Convection
  • Instabilities
  • Stars: neutron
  • Supernovae: general
  • Supernovae: individual (SN 1987A)

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Axisymmetric neutrino radiation and the mechanism of supernova explosions. / Shimizu, Tetsuya; Yamada, Shoichi; Sato, Katsuhiko.

In: Astrophysical Journal, Vol. 432, No. 2 PART 2, 10.09.1994.

Research output: Contribution to journalArticle

Shimizu, Tetsuya ; Yamada, Shoichi ; Sato, Katsuhiko. / Axisymmetric neutrino radiation and the mechanism of supernova explosions. In: Astrophysical Journal. 1994 ; Vol. 432, No. 2 PART 2.
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