Fig. 12
Relationship between the peak separation and the Hα equivalent width. The solid and dashed line represents the average behaviour of 30 classical Be stars with spectral type in the range O9–B3 (Gkouvelis et al., in prep.) and 93 Be stars of all spectral types (Hanuschik 1989), respectively. BeXBs lie systematically above the Be stars’ lines.
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