Model atmospheres for rotating B stars

The results of extensive model atmosphere calculations applicable to rotating early-type stars are presented. While the results largely conform with those of earlier work, it is clear that the effects of rotation on the structure of the interior are likely to play as large a role in determining the emergent spectra of rotating stars as the rotational effects of the atmosphere. However, these effects appear to be sufficient to explain the nature of strong line pole-on Be stars. It appears that, next to rotational broadening, the dominant effect of extreme rotation on the formation of a spectral line is the limb darkening of the line which causes absorption lines to vanish at the limb.