First stars - Type Ib supernovae connection

Ken'Ichi Nomoto, Masaomi Tanaka, Yasuomi Kamiya, Nozomu Tominaga, Keiichi Maeda

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

The very peculiar abundance patterns observed in extremely metal-poor (EMP) stars can not be explained by conventional normal supernova nucleosynthesis but can be well-reproduced by nucleosynthesis in hyper-energetic and hyper-aspherical explosions, i.e., Hypernovae (HNe). Previously, such HNe have been observed only as Type Ic supernovae. Here, we examine the properties of recent Type Ib supernovae (SNe Ib). In particular, SN Ib 2008D associated with the luminous X-ray transient 080109 is found to be a more energetic explosion than normal core-collapse supernovae. We estimate that the progenitor's main sequence mass is MMS = 20 - 25M with an explosion of kinetic energy of EK ~ 6.0 × 1051 erg. These properties are intermediate between those of normal SNe and hypernovae associated with gamma-ray bursts. Therefore, such energetic SNe Ib could also make an important contribution to the chemical enrichment in the early Universe.

本文言語English
ホスト出版物のタイトルLow-Metallicity Star Formation
ホスト出版物のサブタイトルFrom the First Stars to Dwarf Galaxies
ページ182-188
ページ数7
S255
DOI
出版ステータスPublished - 2008
外部発表はい

出版物シリーズ

名前Proceedings of the International Astronomical Union
番号S255
4
ISSN(印刷版)1743-9213
ISSN(電子版)1743-9221

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Astronomy and Astrophysics
  • Nutrition and Dietetics
  • Public Health, Environmental and Occupational Health
  • Space and Planetary Science

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