Chemical element transport in stellar evolution models.

Chemical element transport in stellar evolution models.
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DOI:
10.1098/rsos.170192
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发表时间:
2017-08
影响因子:
3.5
通讯作者:
Cassisi S
Cassisi S
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Salaris M;Cassisi S

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恒星演化计算提供了几种方法的基础,适用于研究恒星和恒星种群的演化特性,银河系和河外。用这些技术获得的结果的准确性与恒星模型的准确性有关,在这种情况下,正确处理化学元素的传输是至关重要的。不幸的是,在许多方面,恒星化学丰度分布演化的计算仍然受到有时相当大的不确定性的影响。在这里,我们审查的各种机制的元素输运包括在当前一代的恒星演化计算,它们是如何实现的,自由参数和不确定性,对模型的影响和观测的限制。
Stellar evolution computations provide the foundation of several methods applied to study the evolutionary properties of stars and stellar populations, both Galactic and extragalactic. The accuracy of the results obtained with these techniques is linked to the accuracy of the stellar models, and in this context the correct treatment of the transport of chemical elements is crucial. Unfortunately, in many respects calculations of the evolution of the chemical abundance profiles in stars are still affected by sometimes sizable uncertainties. Here, we review the various mechanisms of element transport included in the current generation of stellar evolution calculations, how they are implemented, the free parameters and uncertainties involved, the impact on the models and the observational constraints.
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