Unveiling the nature of HE 0107–5240: a long period binary CEMP-no star with [Fe/H] of –5.56

Open Access

Fig. 6

3D correction factor for the ¹²C/¹³C isotopic ratio versus the 1D isotopic ratio for different strengths of the ¹³CH component of the 423.1 nm line pair. A 1D isotopic ratio of 100 with a ¹³CH equivalent width of 2 mÅ corresponds to a 3D isotopic ratio of ≈90.

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