The dynamical evolution of planetary nebulae

被引：7
|
作者：
Schoenberner, Detlef [1 ]
机构：
[1] Leibniz Inst Astrophys Potsdam, An der Sternwarte 16, D-14482 Potsdam, Germany
来源：
11TH PACIFIC RIM CONFERENCE ON STELLAR ASTROPHYSICS: PHYSICS AND CHEMISTRY OF THE LATE STAGES OF STELLAR EVOLUTION, PTS 1-6 | 2016年 / 728卷
关键词：
INTERMEDIATE-MASS STARS; RADIATION-DRIVEN WINDS; HYDRODYNAMICAL MODELS; STELLAR EVOLUTION; CIRCUMSTELLAR GAS; HOT BUBBLE; EXPANSION; GASDYNAMICS;
D O I：
10.1088/1742-6596/728/3/032001
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Based on modern 1D-radiation-hydrodynamics simulations of formation and evolution of planetary nebulae, I discuss in detail the basic dynamical processes responsible for the "grand design" of most planetary nebulae, i.e. their double-shell morphology and their typical expansion properties. Special emphasis is given for a proper definition of a nebula's true expansion rate and its relation to spectroscopically measurable Doppler velocities of the expanding material. It is found that the typical nebular expansion is about twice as fast as hitherto assumed, viz. similar or equal to 45 kms(-1) .
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页数：8
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