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Fig. 7


Abundance ratios [Si/Fe] vs. [C/Fe] of CEMP-no stars. The stars are not all the same ones as in Fig. 5, because not all stars that have Ca data necessarily have Si data. A thick horizontal blue line indicates the approximate average of the [Si/Fe] ratios. The location corresponding to a solar ratio [Si/C] = 0 is shown with a red line.

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