Fig. 14.
Distribution of spectral types for MS stars, where yellow indicates B stars and green indicates Be stars. The left axis shows the total number of stars, while the right axis indicates the Be star fraction in each bin. The accuracy of spectral type determination is about one spectral subtype. Overplotted is the Be star fraction in each bin, for which we give counting errors, except for cases where the Be star fraction is 0 or 100%.
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