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Paper: Observations of massive OB stars
Volume: 7, Properties of Hot Luminous Stars: Boulder-Munich Workshop
Page: 50
Authors: Herrero, Artemio; Vilchez, Jose Manuel; Kudritzki, Rolf Peter
Abstract: Preliminary results are presented of spectroscopic analysis of ten young stars in OB associations using high resolution spectra and NLTE calculations. From the known distances the stellar masses are derived. The comparison with evolutionary tracks indicates a possible discrepancy between the masses and enhanced helium abundances derived from the tracks and from the analysis.
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