Solar model: Element diffusion or metal-enhanced envelope?
Solar model: Element diffusion or metal-enhanced envelope?
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DOI：
10.1051/0004-6361:20000290
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发表时间：
2001
影响因子：
6.5
通讯作者：
J. Yang;Yingrui Li;H. Y. Xu
中科院分区：
文献类型：
--
作者：
J. Yang;Yingrui Li;H. Y. Xu
利用更新的输入物理研究了对流层中重元素中等富集和元素扩散的太阳模型。结果表明，CSM和DSM都能使对流区具有足够的深度，并使表面氦丰度达到合适的水平，而且p模频率的计算值与观测值的一致性也得到了改善。DSM的声速优于CSM和标准太阳模型（SSM），这意味着元素扩散有助于改善太阳内部的声速剖面。在对流层底部以下的区域，CSM是三种模式中最好的。
Solar models with moderate enrichment of heavy elements in the convective envelope (CSM) and with element diffusion (DSM) are investigated using updated input physics. It is found that both CSM and DSM can result in adequate depth of the convection zone and appropriate surface helium abundance, and the agreement between the calculated and observed p-mode frequencies are also improved. The sound speed of DSM is better than CSM and the standard solar model (SSM) in the deep interior, which means that element diffusion helps improve the sound speed profile in the solar interior. In the area just below the base of the convection zone, CSM is the best of the three models.