Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...262l..17h&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 262, no. 2, p. L17-L20.
Astronomy and Astrophysics
Astrophysics
28
B Stars, Light Scattering, Line Spectra, Radiative Transfer, Stellar Spectra, Emission Spectra, Line Shape, Stellar Structure
Scientific paper
Based on 3D radiative line-transfer calculations, theoretical emission-line profiles from homogeneous, isothermal, rotating disks around Be stars are presented. The emission-line profiles for a two-level atom with complete redistribution show symmetric double peaks and symmetric flank inflections (of the winebottle-type) as a natural consequence of the combination of two mechanisms: rotational broadening in a Keplerian disk and broadening by noncoherent scattering, due to multiple absorption and reemission of line radiation perpendicular to the disk plane. This new interpretation is offered as an alternative to the two-component disk-model of Kogure (1969).
Dachs Joachim
Hummel Wolfgang
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