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Fig. 15.


Multiplicity fraction MF as measured with GRAVITY for mass ranges < 3 M, 3–7 M, 7–16 M, > 16 M (red circles). The values from Duchêne & Kraus (2013) for the whole mass range of ≲1 M to O stars and the values from Sana et al. (2014) for O stars are plotted for reference. For each mass range we use as uncertainty estimate.

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