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Nucleosynthetic signatures of the first stars

Author

Listed:
  • Anna Frebel

    (The Australian National University)

  • Wako Aoki

    (National Astronomical Observatory of Japan)

  • Norbert Christlieb

    (National Astronomical Observatory of Japan
    Hamburger Sternwarte)

  • Hiroyasu Ando

    (National Astronomical Observatory of Japan)

  • Martin Asplund

    (The Australian National University)

  • Paul S. Barklem

    (Uppsala Astronomical Observatory)

  • Timothy C. Beers

    (Michigan State University)

  • Kjell Eriksson

    (Uppsala Astronomical Observatory)

  • Cora Fechner

    (Hamburger Sternwarte)

  • Masayuki Y. Fujimoto

    (Hokkaido University)

  • Satoshi Honda

    (National Astronomical Observatory of Japan)

  • Toshitaka Kajino

    (National Astronomical Observatory of Japan)

  • Takeo Minezaki

    (University of Tokyo)

  • Ken'ichi Nomoto

    (University of Tokyo)

  • John E. Norris

    (The Australian National University)

  • Sean G. Ryan

    (Open University)

  • Masahide Takada-Hidai

    (Tokai University)

  • Stelios Tsangarides

    (Open University)

  • Yuzuru Yoshii

    (University of Tokyo)

Abstract

Low-metal stars: second site When HE010715240 was discovered in 2002 it was the most metal-deficient star known. (Astrophysicists use the term ‘metal’ for all elements bar hydrogen and helium.) It had an iron abundance 20 times lower than previously recorded, suggesting that here was a relic, a star formed soon after the Big Bang. Now a second ‘unevolved’ star has been discovered: HE132712326, with an iron abundance about half that of HE010715240. One low-metal star was a novelty; two is a new class of stellar object. The similarities (in C and N content) and contrasts (in Li and Sr) between these two stellar relics present challenges to theories of star formation and may lead to new discoveries about how the elements were synthesized in the first stars.

Suggested Citation

  • Anna Frebel & Wako Aoki & Norbert Christlieb & Hiroyasu Ando & Martin Asplund & Paul S. Barklem & Timothy C. Beers & Kjell Eriksson & Cora Fechner & Masayuki Y. Fujimoto & Satoshi Honda & Toshitaka Ka, 2005. "Nucleosynthetic signatures of the first stars," Nature, Nature, vol. 434(7035), pages 871-873, April.
    • Handle: RePEc:nat:nature:v:434:y:2005:i:7035:d:10.1038_nature03455
    DOI: 10.1038/nature03455
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