METAL-POOR PLANETARY-NEBULAE - EFFECTS OF WINDS

被引：5
|
作者：
MACIEL, WJ
机构：
[1] Instituto Astronômico e Geofísico da USP, São Paulo SP
来源：
ASTROPHYSICS AND SPACE SCIENCE | 1993年 / 209卷 / 01期
关键词：
D O I：
10.1007/BF00666437
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Some planetary nebulae in the galactic thick disk display extremely low abundances of heavy elements such as O, Ne, S, and Ar, compared with ''normal'' or type II nebulae. Their central stars are generally relatively cool and underluminous, indicating that the progenitor stars had very low masses. It is suggested that strong stellar winds have had an important role in the formation of these objects, which is supported by the large mass loss rates now observed.
引用
收藏
页码：65 / 70
页数：6
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