Detailed abundances in a sample of very metal-poor stars

  title={Detailed abundances in a sample of very metal-poor stars},
  author={P. François and Shinya Wanajo and E. Caffau and Nikos Prantzos and Wako Aoki and Misa Aoki and Piercarlo Bonifacio and Monique Spite and F. Spite},
  journal={Astronomy \& Astrophysics},
Context. Unevolved metal-poor stars bore witness to the early evolution of the Galaxy, and the determination of their detailed chemical composition is an important tool to understand its chemical history. The study of their chemical composition can also be used to constrain the nucleosynthesis of the first generation of supernovae that enriched the interstellar medium. Aims. We aim to observe a sample of extremely metal-poor star (EMP stars) candidates selected from the Sloan Digital Sky Survey… 
Accurate Metallicities for Very Metal-poor Stars from the Ca ii Infrared Triplet
The Ca ii H and K lines are among the few features available to infer the metallicity of extremely metal-poor stars from medium-resolution spectroscopy. Unfortunately, these lines can overlap with
Context. The goal of the Turn-Off Primordial Stars survey (TOPoS) project is to find and analyse turn-off (TO) stars of extremely low metallicity. To select the targets for spectroscopic follow-up at


2013a, A&A, 560
  • Phys 268,
  • 2012
Landolt-Börnstein - Group VI
  • 2009
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Context. Extremely metal-poor (EMP) stars provide us with indirect information on the first generations of massive stars. The TOPoS survey has been designed to increase the census of these stars and
First stars XI. Chemical composition of the extremely metal-poor dwarfs in the binary CS 22876-032
Context: Unevolved metal-poor stars constitute a fossil record of the early Galaxy, and can provide invaluable information on the properties of the first generations of stars. Binary systems also
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We present an analysis of high-resolution Keck/HIRES spectroscopic observations of J0815+4729, an extremely carbon-enhanced, iron-poor dwarf star. These high-quality data allow us to derive a
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Context. The primordial nature of the Spite plateau is at odds with the WMAP satellite measurements, implying a primordial Li production at least three times higher than observed. It has also been
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We give a progress report on the activities within the CIFIST Team related to the search for extremely metal-poor (EMP) stars in the Sloan Digital Sky Survey's (SDSS) spectroscopic catalogue. So far,
Back to the Lithium Plateau with the [Fe/H] < −6 Star J0023+0307
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High-resolution echelle spectra have been obtained for four of the extremely metal-deficient stars from the HK objective-prism/interference-filter survey of Beers, Preston, and Shectman. Model