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Fig. A.1

image

Spectral region of the He I λ10830 Å lines. The gray line is the average stellar spectrum, the dark-blue line is a model that includes the seven strongest stellar lines in the direct vicinity of the triplet lines used for the correction of the stellar rest frame. The position of the He I triplet is marked by vertical solid lines; the other seven spectral lines are labeled and marked by dashed lines.

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