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Fig. 18

image

Mass vs. period distribution for periodic candidate members of CygOB2. Stars with reliable periods (P ≥ 2 days) are shown as black circles, and stars with dubious periods (P< 2 days) are shown as red circles. Dashed red lines delimit for periods equal to 2 and 10 days. The blue dashed line indicates the limit between the mass bins analyzed in the present section.

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