Fundamental parameters of Galactic luminous OB stars IV . The upper HR diagram ?

Abstract

We present observations and analyses of seven Galactic O stars of type O6 and earlier. The analyses are carried out using NLTE plane–parallel, hydrostatic models as well as NLTE spherical models with mass-loss. With detailed calculations for the former and simulations for the latter, it is shown that the flux blocking due to UV metal lines is important for… (More)

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