Three Si iii absorption lines observed in MWC 314 (black solid lines) are overplotted with theoretical line profiles computed in non-LTE with Multi. The line transfer calculations use atmosphere models of Teff = 17 kK (dashed drawn lines), 18 kK (solid drawn lines), and 19 kK (dash-dotted lines). Boldly drawn lines are computed with log g = 2.5, and thin drawn lines for log g = 3.0. Atmosphere models with Teff > 19 kK yield Si iii line equivalent widths incompatible with observed values. The detailed profile fits require Vrotsini ≃ 50 km s-1.
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