The connection between gamma-ray bursts and extremely metal-poor stars as nucleosynthetic probes of the early universe

K. Nomoto, N. Tominaga, M. Tanaka, K. Maeda, H. Umeda

Research output: Contribution to journalArticle

Abstract

The connection between the long GRBs and Type Ic Supernovae (SNe) has revealed the interesting diversity: (i) GRB-SNe, (ii) Non-GRB Hypernovae (HNe), (iii) X-Ray Flash (XRF)-SNe, and (iv) Non-SN GRBs (or dark HNe). We show that nucleosynthetic properties found in the above diversity are connected to the variation of the abundance patterns of extremely-metal-poor (EMP) stars, such as the excess of C, Co, Zn relative to Fe. We explain such a connection in a unified manner as nucleosynthesis of hyper-aspherical (jet-induced) explosions of Pop III core-collapse SNe. We show that (1) the explosions with large energy deposition rate, Ėdep, are observed as GRB-HNe and their yields can explain the abundances of normal EMP stars, and (2) the explosions with small Ėdep are observed as GRBs without bright SNe and can be responsible for the formation of the C-rich EMP (CEMP) and the hyper metal-poor (HMP) stars. We thus propose that GRB-HNe and the Non-SN GRBs (dark HNe) belong to a continuous series of BH-forming massive stellar deaths with the relativistic jets of different Ėdep.

Original languageEnglish
Pages (from-to)463-470
Number of pages8
JournalProceedings of the International Astronomical Union
Volume3
Issue numberS250
DOIs
Publication statusPublished - 2007 Dec 1
Externally publishedYes

Keywords

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

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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