Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...289..458h&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 289, no. 2, p. 458-468
Astronomy and Astrophysics
Astrophysics
37
B Stars, Density Distribution, Emission Spectra, H Alpha Line, Stellar Envelopes, Variable Stars, Disks (Shapes), Inclination, Incoherent Scattering, Radiative Transfer, Radii, Stellar Models
Scientific paper
Based on 3D radiative line transfer calculations for inhomogeneous Be star circumstellar envelopes, theoretical H alpha 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 H alpha variability of HR 2825 in the eighties can be explained by line splitting over-crossing due to non-coherent scattering broadening caused b 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 H alpha line profiles.
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