Planetary nebula carbon yields and the chemical evolution of the Galactic disc

被引:10
作者
Carigi, L [1 ]
机构
[1] Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico
关键词
planetary nebulae : general; Galaxy : abundances; Galaxy : disc; Galaxy : evolution; solar neighbourhood;
D O I
10.1046/j.1365-8711.2003.06225.x
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Two sets of observational carbon stellar yields for low- and-intermediate mass stars are computed based on planetary nebula abundances derived from C iilambda4267 and C iiilambdalambda1906 + 1909 lines, respectively. These observational yields are assumed in chemical evolution models for the solar vicinity and the Galactic disc. C/O values observed in stars in the solar vicinity and Galactic H ii regions are compared with those predicted by chemical evolution models for the Galaxy. It is concluded that the C yields derived from permitted lines are in better agreement with the observational constraints than are those derived from forbidden lines.
引用
收藏
页码:825 / 833
页数:9
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