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Fig. 4

image

Fit to the C2 Swan (0, 1) band head at 5635.5 Å in the star Collinder 261 RGB05. The observed spectrum is shown as a black line with dots. The blue line is the synthetic spectra with [ C/Fe ] = −0.1 and the green and red lines show the abundance of ± 0.1 dex.

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