1994A&A...289..458H

Based on 3D radiative line transfer calculations for inhomogeneous Be star circumstellar envelopes, theoretical Hα emission line profiles are presented. The results show that the so-called winebottle-type emission line profiles and shell profiles can be generated by the same optically thick Keplerian disk viewed at different inclination angles i. The Hα variability of HR 2825 in the eighties can be explained by line splitting overcrossing due to non-coherent scattering broadening caused by a density variation in the envelope. Huang's law is re-investigated; its restricted application for winebottle-type and shell line profiles is discussed. Finally the calculated emission line profiles are compared with observed Hα line profiles.