Low-mass helium star models for type Ib supernovae: Light curves, mixing, and nucleosynthesis

Toshikazu Shigeyama, Ken'ichi Nomoto, Takuji Tsujimoto, Masa Aki Hashimoto

Research output: Contribution to journalArticle

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Abstract

Light curves, Rayleigh-Taylor instability, and nucleosynthesis of exploding helium stars are examined to look for relevant models for Type Ib supernovae, especially for SN 1983N and 19831 whose light curves decline as fast as Type Ia supernovae. The calculated light curves show a systematic dependence on the stellar mass, because smaller mass helium stars undergo more extensive mixing and eject smaller mass, thereby forming light curves with steeper tails. The relatively fast decline of the SN Ib light curves can thus be accounted for by the helium star models if the helium star mass is as low as 3-4 M and if 56Ni is mixed to the surface layers. Moreover, the 3-4 M helium stars, having relatively small mass iron cores, can produce ∼0.15 M 56Ni as required from the maximum luminosities. In terms of nucleosynthesis, mixing, and light curves, the helium stars of 3-4 M (which form from stars with Mms ∼ 12-16 M in binary systems) are the most relevant progenitors of the Type Ib supernovae 1983N and 19831.

Original languageEnglish
Pages (from-to)L23-L27
JournalAstrophysical Journal
Volume361
Issue number1 PART 2
DOIs
Publication statusPublished - Sep 20 1990

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B stars
nuclear fusion
helium
light curve
supernovae
M stars
Taylor instability
curves
stellar mass
surface layer
surface layers
luminosity
iron
stars

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Shigeyama, T., Nomoto, K., Tsujimoto, T., & Hashimoto, M. A. (1990). Low-mass helium star models for type Ib supernovae: Light curves, mixing, and nucleosynthesis. Astrophysical Journal, 361(1 PART 2), L23-L27. https://doi.org/10.1086/185818

Low-mass helium star models for type Ib supernovae : Light curves, mixing, and nucleosynthesis. / Shigeyama, Toshikazu; Nomoto, Ken'ichi; Tsujimoto, Takuji; Hashimoto, Masa Aki.

In: Astrophysical Journal, Vol. 361, No. 1 PART 2, 20.09.1990, p. L23-L27.

Research output: Contribution to journalArticle

Shigeyama, T, Nomoto, K, Tsujimoto, T & Hashimoto, MA 1990, 'Low-mass helium star models for type Ib supernovae: Light curves, mixing, and nucleosynthesis', Astrophysical Journal, vol. 361, no. 1 PART 2, pp. L23-L27. https://doi.org/10.1086/185818
Shigeyama, Toshikazu ; Nomoto, Ken'ichi ; Tsujimoto, Takuji ; Hashimoto, Masa Aki. / Low-mass helium star models for type Ib supernovae : Light curves, mixing, and nucleosynthesis. In: Astrophysical Journal. 1990 ; Vol. 361, No. 1 PART 2. pp. L23-L27.
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