Abstract
We discuss the fraction of carbon stars (C-stars) and of C-enhanced stars among samples of candidate extremely metal poor (EMP: [Fe/H] ≤ -3.0 dex) stars selected from the Hamburg/ESO Survey (HES), obtaining a total for C-rich stars with [C/Fe] ≥ + 1.0 dex of 14.4±4%. We also present the key results of detailed abundance analyses of a sample of 14 C-stars selected in this way. © 2005 International Astronomical Union.
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Cohen, J. G., Shectman, S., Thompson, I., McWilliam, A., Christlieb, N., Melendez, J., … Swenson, A. (2005). The frequency of carbon rich stars among extremely metal poor stars. Proceedings of the International Astronomical Union, 1(S228), 213–218. https://doi.org/10.1017/S1743921305005570
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