HIGH-RESOLUTION SPECTROSCOPY OF SOUTHERN AND EQUATORIAL BE STARS - FLUX EXCESS AT LAMBDA-4471 ANGSTROM

We present a catalogue of high-resolution He I 4471, Mg II 4481 and H gamma line profiles observed simultaneously for 37 southern and equato rial Be stars. In this paper are focus on the He I 4471 line, which is studied using non-LTE model line profiles. A systematic difference is found between the observed and the theoretical He I 4471 line equival ent widths. This difference strongly correlates with the fly emission and we interpret it as being due mainly to the veiling effect produced by the continuum emission excess originating in the circumstellar env elope. To determine the continuum flux excess we use two methods. One method enables us to obtain simultaneously the V sin i parameter. The flux excess we determined is overestimated by about 9% on average, bec ause in the line profile analysis we neglected the gravity darkening e ffect due to stellar rotation. We find that 14 program stars present t wo possible solutions for V sin i. The second solution is, on average, 14% smaller and produces a small residual or emission-like difference between the observed He I 4471 line profile and the model profile.