Fig. 4

Comparison of our working sample of Galactic O dwarfs (pink and black) with respect to those included in GOSC (gray). Left: same as Fig. 1, but only for luminosity class V stars. Right: histograms of the reddening parameter (E(4405–5495)~E(B–V)) separated by ranges in spectral type: earlier (top) and later (bottom) than O6.5.
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