Fig. 11
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Measured Brα EWs vs. the mass-loss rates of 55 Cyg at different epochs (blue symbols). The linear correlation (blue line) to our data is compared with the relationship found by Lenorzer et al. (2002), which was obtained from ISO spectra of O-type stars and B-type supergiants (red line and square symbols) where the mass-loss rate was obtained from Hα or radio measurements.
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