TURBULENT CONVECTION MODEL IN THE OVERSHOOTING REGION. I. EFFECTS OF THE CONVECTIVE MIXING IN THE SOLAR OVERSHOOTING REGION

被引：32
|
作者：
Zhang, Q. S. [1 ,2 ,3 ]
Li, Y. [1 ,2 ]
机构：
[1] Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China
[2] Chinese Acad Sci, Lab Struct & Evolut Celestial Objects, Kunming 650011, Peoples R China
[3] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
来源：
ASTROPHYSICAL JOURNAL | 2012年 / 746卷 / 01期
基金：
中国国家自然科学基金;
关键词：
convection; diffusion; Sun: helioseismology; Sun: interior; turbulence; NONLOCAL CONVECTION; ABUNDANCES; DIFFUSION; BASE; DEPTH; STATE; ZONE; DEPLETION; EVOLUTION; EQUATION;
D O I：
10.1088/0004-637X/746/1/50
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The overshooting in the framework of the turbulent convection model is investigated in the solar overshooting region. The overshooting mixing is treated as a diffusive process. It is found that the sound speed profile can be improved to be in good agreement with helioseismic inversions. The bump in the sound speed differences between solar models and the helioseismical inversions below the base of the solar convective envelope is almost eliminated by the overshooting mixing. The overshooting mixing leads to a significant depletion of Li in the main-sequence stage. Li abundance in the solar surface can be reduced to about 1% of its initial abundance in the solar models with the overshooting mixing. The solar model with the overshooting shows a smooth profile of the temperature gradient, which is also favored by the helioseismology.
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页数：7
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