The Chemical Compositions of Carbon-Enhanced Metal-Poor Stars

  • W. Aoki
  • S.G. Ryan
  • J.E. Norris
  • T.C. Beers
  • N. Christlieb
  • S. Tsangarides
  • H. Ando
Conference paper
Part of the ESO ASTROPHYSICS SYMPOSIA book series (ESO)

Abstract

Recent surveys of metal-deficient stars have discovered a large number of carbon-rich objects, with a marked increase in their frequency at [Fe/H] < −2.5. In order to constrain the origin(s) of their carbon excesses, we have performed elemental abundance analyses for 40 objects selected from candidate metal-poor stars with strong CH Gbands identified in the HK and Hamburg/ESO surveys. High-resolution spectroscopy has beenobtained with AAT/UCLES and Subaru/HDS; a portion of these studies have already been published [1–3].

Keywords

Carbon Excess Asymptotic Giant Branch Carbon Enrichment Abundance Analysis Asymptotic Giant Branch Star 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Springer 2006

Authors and Affiliations

  • W. Aoki
    • 1
  • S.G. Ryan
    • 2
  • J.E. Norris
    • 3
  • T.C. Beers
    • 4
  • N. Christlieb
    • 5
  • S. Tsangarides
    • 2
  • H. Ando
    • 1
  1. 1.National Astronomical ObservatoryTokyoJapan
  2. 2.The Open UniversityMilton KeynesUK
  3. 3.The Australian National UniversityWestonAustralia
  4. 4.Michigan State UniversityEast Lansing
  5. 5.Hamburg UniversityHamburgGermany

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