AGB and post-AGB evolution:: Structural and chemical changes

被引：0

作者：

Blöcker, T ^{[1
]}

Osterbart, R ^{[1
]}

Weigelt, G ^{[1
]}

Balega, Y ^{[1
]}

Men'shchikov, A ^{[1
]}

机构：

[1] Max Planck Inst Radioastron, D-53121 Bonn, Germany

来源：

POST-AGB OBJECTS AS A PHASE OF STELLAR EVOLUTION | 2001年 / 265卷

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：

Structural and chemical changes during the AGB and post-AGB evolution are discussed with respect to two recent observational and theoretical findings. On the one hand, high-resolution infrared observations revealed details of the dynamical evolution of the fragmented, bipolar dust shell around the far-evolved carbon star IRC+ 10216 giving evidence for rapid changes of an already PPN-like structure during the very end of the AGB evolution. On the other hand, stellar evolution calculations considering convective overshoot have shown how thermal pulses during the post-AGB stage lead to the formation of hydrogen-deficient post-AGB stars with abundance patterns consistent with those observed for Wolf-Rayet central stars.

引用

页码：241 / 248

页数：8

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