Galactic chemical abundance evolution in the solar neighborhood up to the iron peak

被引:91
作者
Alibés, A
Labay, J
Canal, R
机构
[1] Univ Barcelona, Dept Astron & Meteorol, E-08028 Barcelona, Spain
[2] Inst Estudis Espacials Catalunya Edifici Nexus, Barcelona 08034, Spain
来源
ASTRONOMY & ASTROPHYSICS | 2001年 / 370卷 / 03期
关键词
nuclear reactions; nucleosynthesis; abundances; stars : abundances; Galaxy : abundances; Galaxy : evolution; Galaxy : general;
D O I
10.1051/0004-6361:20010296
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We have developed a detailed standard chemical evolution model to study the evolution of all the chemical elements up to the iron peak in the solar vicinity. We consider that the Galaxy was formed through two episodes of exponentially decreasing infall out of extragalactic gas. In a first infall episode, with a duration of similar to1 Gyr, the halo and the thick disk were assembled out of primordial gas, while the thin disk formed in a second episode of infall of slightly enriched extragalactic gas. with much longer timescale. The model nicely reproduces the main observational constraints of the solar neighborhood, and the calculated elemental abundances at the time of the solar birth are in excellent agreement with the solar abundances. By the inclusion of metallicity-dependent yields for the whole range of stellar masses we follow the evolution of 76 isotopes of all the chemical elements between hydrogen and zinc. Those results are compared with a large and recent body of observational data, and we discuss in detail the implications for stellar nucleosynthesis.
引用
收藏
页码:1103 / 1121
页数:19
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