GALACTIC CHEMICAL EVOLUTION: THE IMPACT OF THE 13C-POCKET STRUCTURE ON THE s-PROCESS DISTRIBUTION
GALACTIC CHEMICAL EVOLUTION: THE IMPACT OF THE 13C-POCKET STRUCTURE ON THE s-PROCESS DISTRIBUTION
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DOI：
10.3847/1538-4357/835/1/97
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发表时间：
2017-01
期刊：
影响因子：
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通讯作者：
S. Bisterzo;C. Travaglio;M. Wiescher;F. Käppeler;R. Gallino
中科院分区：
文献类型：
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作者：
S. Bisterzo;C. Travaglio;M. Wiescher;F. Käppeler;R. Gallino
在银河系化学演化（GCE）模型的框架下分析了太阳s过程的丰度。这项工作的目的是实施Bisterzo等人的研究，他研究了渐近巨分支（AGB）产额的一个主要不确定性的影响，即13 C口袋的内部结构。我们提出的GCE预测的S-过程元素计算与额外的测试在最近的出版物中提供的建议。分析扩展到不同的金属丰度，通过比较GCE结果和更新的光谱观测未演化的场星。我们验证，GCE预测与不同的测试可能代表，平均而言，在银河系中选定的中子捕获元素的演变。此外，还探讨了来自快速旋转大质量恒星的额外弱s过程贡献的影响。
The solar s-process abundances have been analyzed in the framework of a Galactic Chemical Evolution (GCE) model. The aim of this work is to implement the study by Bisterzo et al., who investigated the effect of one of the major uncertainties of asymptotic giant branch (AGB) yields, the internal structure of the 13C pocket. We present GCE predictions of s-process elements computed with additional tests in the light of suggestions provided in recent publications. The analysis is extended to different metallicities, by comparing GCE results and updated spectroscopic observations of unevolved field stars. We verify that the GCE predictions obtained with different tests may represent, on average, the evolution of selected neutron-capture elements in the Galaxy. The impact of an additional weak s-process contribution from fast-rotating massive stars is also explored.