Open Access
Fig. 7
Absolute C abundances versus [Fe/H] (LTE). Indications of CEMP-no (blue line – low A(C)), CEMP-s (red line – high A(C)), and C-normal metal-poor stars (separated by the green line [C/Fe] = 0.7) have been indicated. BD + 90_2190 is shown by a star.
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