Fig. 11
Example of EW variations for He I λ 5016 and He II λ 4200 for model E5. The EWs have been normalized to the highest value. Top: variations measured on individual spectra (EWp,max,HeI = 0.20 Å, EWp,max,HeII = 0.48 Å, EWs,max,HeI = 0.21 Å, EWs,max,HeII = 0.48 Å. Bottom: variations measured on combined spectra (EWp,max,HeI = 0.12 Å, EWp,max,HeII = 0.27 Å, EWs,max,HeI = 0.11 Å, EWs,max,HeII = 0.24 Å).
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