NONCOHERENT SCATTERING IN VERTICALLY EXTENDED BE STAR DISKS - WINEBOTTLE-TYPE EMISSION-LINE PROFILES

被引：0
|
作者：
HUMMEL, W
DACHS, J
机构：
来源：
ASTRONOMY & ASTROPHYSICS | 1992年 / 262卷 / 02期
关键词：
LINE; PROFILES; RADIATION TRANSFER; CIRCUMSTELLAR MATTER; STARS; EMISSION-LINE; BE;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Based on three-dimensional 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 non-coherent scattering, due to multiple absorption and re-emission 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).
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页码：L17 / L20
页数：4
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