First stars - Type Ib supernovae connection

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

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)


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.

Original languageEnglish
Title of host publicationLow-Metallicity Star Formation
Subtitle of host publicationFrom the First Stars to Dwarf Galaxies
Number of pages7
Publication statusPublished - 2008

Publication series

NameProceedings of the International Astronomical Union
ISSN (Print)1743-9213
ISSN (Electronic)1743-9221


  • Abundances
  • Galaxy: halo
  • Gamma rays: bursts
  • Nuclear reactions
  • Nucleosynthesis
  • Stars: abundances
  • Stars: Population II
  • Supernovae: general


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