Instabilities and mixing in SN 1993J

Kohichi Iwamoto, Tlmothy R. Young, Naohito Nakasato, Toshlkazu Shlgeyama, Ke N.Ichi Nomoto, Izumi Hachisu, Hldeyuki Said

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

Rayleigh-Taylor (R-T) instabilities in the explosion of SN 1993J are investigated by means of two-dimensional hydrodynamical simulations. It is found that the extent of mixing is sensitive to the progenitor's core mass and the envelope mass. Because the helium core mass (3-4 M) is smaller than that of SN 1987A, R-T instabilities at the He/C+O interface develop to induce a large-scale mixing in the helium core, while the instability is relatively weak at the H/He interface as a result of the small envelope mass. The predicted abundance distributions, in particular the extent of the 56Ni mixing, are compared with those required in modeling the bolometric light curve and the late-time optical spectra. These comparisons provide significant constraints on the masses of the helium core and the envelope of the progenitor of SN 1993J.

Original languageEnglish
Pages (from-to)865-875
Number of pages11
JournalAstrophysical Journal
Volume477
Issue number2 PART I
DOIs
Publication statusPublished - 1997
Externally publishedYes

Keywords

  • Hydrodynamics
  • Instabilities
  • Stars: interiors
  • Supernovae: individual (SN 1993j)

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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