Chemical Evolution of the System of Galactic Planetary Nebulae

被引：0
|
作者：
Yu. V. Lunyova
A. F. Kholtygin
机构：
[1] Saint Petersburg State University,V. V. Sobolev Astronomical Institute
来源：
Astrophysics | 2002年 / 45卷
关键词：
ISM planetary nebulae; planetary nebulae evolution;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The problem of the chemical evolution of the system of Galactic planetary nebulae, starting with the early stage of development of the Galaxy, is investigated. The radial and vertical gradients of C, N, O, Ne, Ar, Cl, and S abundances are determined for different ages of the precursor stars of the nebulae. A statistically significant age dependence of the gradients is derived.
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页码：370 / 379
页数：9
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