Extended dust shells surrounding AGB stars revealed with ISO

被引：0

作者：

Izumiura, H ^{[1
]}

Hashimoto, O

机构：

[1] NAOJ, Okayama Astrophys Observ, Okayama 7190232, Japan

[2] Gunma Astron Observ, Maebashi, Gumma 3710847, Japan

来源：

ASYMPTOTIC GIANT BRANCH STARS | 1999年 / 191期

关键词：

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We obtained high resolution far-infrared images of the circumstellar dust shells of several AGB carbon stars using ISOPHOT on board the ISO. We used the C-100 and C-200 detector arrays in PHT32 oversampling mode at 90 mum and 160 mum except for U Ant, which was observed at 60 mum and 90 mum. AFGL 3068 is very compact in both bands. R Scl is marginally resolved at 90 mum. U Ant shows a double shell structure, a compact but well resolved shell surrounded by a very extended envelope. Y CVn exhibits a very extended, hollow dust shell. We analyse the structure of the dust shells using a simple dust shell model and discuss the mass-loss behaviors, particularly in conjunction with the thermal pulses on the AGB.

引用

页码：401 / 406

页数：6

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