The circumstellar envelope of AFGL 4106

被引：0
作者：
van Loon, JT
Molster, FJ
van Winckel, H
Waters, LBFM
机构：
[1] Univ Amsterdam, Astron Inst, NL-1098 SJ Amsterdam, Netherlands
[2] Catholic Univ Leuven, Astron Inst, B-3001 Heverlee, Belgium
[3] Space Res Org Netherlands, NL-9700 AV Groningen, Netherlands
来源：
ASTRONOMY & ASTROPHYSICS | 1999年 / 350卷 / 01期
关键词：
stars : binaries : spectroscopic; stars : circumstellar matter; stars : individual : AFGL 4106; stars : mass-loss; stars : AGB and post-AGB; stars : supergiants;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present new imaging and spectroscopy of the post-red supergiant binary AFGL 4106. Coronographic imaging in H alpha reveals the shape and extent of the ionized region in the circumstellar envelope (CSE). Echelle spectroscopy with the slit covering almost the entire extent of the CSE is used to derive the physical conditions in the ionized region and the optical depth of the dust contained within the CSE. The dust shell around AFGL 4106 is clumpy and mixed with ionized gas. H alpha and [N II] emission is brightest from a thin bow-shaped layer just outside of the detached dust shell. Ongoing mass loss is traced by [Ca II] emission and blue-shifted absorption in lines of low-ionization species. A simple model is used to interpret the spatial distribution of the circumstellar extinction and the dust emission in a consistent way.
引用
收藏
页码：120 / 128
页数：9
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