Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-01-11
in 13th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun, 2005, F. Favata et al. (ed.), ESA
Astronomy and Astrophysics
Astrophysics
3 pages, 4 figures, presented at Cool Stars 13, Hamburg, 2004
Scientific paper
Large surveys of very metal-poor stars have revealed in recent years that a large fraction of these objects were carbon-rich, analogous to the more metal-rich CH-stars. The abundance peculiarities of CH-stars are commonly explained by mass-transfer from a more evolved companion. In an effort to better understand the origin and importance for Galactic evolution of Fe-poor, C-rich stars, we present abundances determined from high-resolution and high signal-to-noise spectra obtained with the UVES instrument attached to the ESO/VLT. Our analysis of carbon-enhanced objects includes both CH stars and more metal-poor objects, and we explore the link between the two classes. We also present preliminary results of our ongoing radial velocity monitoring.
Jorissen Alain
Masseron Thomas
Plez Bertrand
Primas Francesca
Van Eck Sophie
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