Helioseismology and solar abundances

被引:307
|
作者
Basu, Sarbani [1 ]
Antia, H. M. [2 ]
机构
[1] Yale Univ, Dept Astron, New Haven, CT 06520 USA
[2] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India
来源
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS | 2008年 / 457卷 / 5-6期
基金
美国国家科学基金会; 美国国家航空航天局; 英国科学技术设施理事会;
关键词
solar interior; helioseismology; abundances;
D O I
10.1016/j.physrep.2007.12.002
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Helioseismology has allowed us to study the structure of the Sun in unprecedented detail. One of the triumphs of the theory of stellar evolution was that helioseismic studies had shown that the structure of solar models is very similar to that of the Sun. However, this agreement has been spoiled by recent revisions of the solar heavy-element abundances. Heavy-element abundances determine the opacity of the stellar material and hence, are an important input to stellar model calculations. The models with the new, low abundances do not satisfy helioseismic constraints. We review here how heavy-element abundances affect solar models, how these models are tested with helioseismology, and the impact of the new abundances on standard solar models. We also discuss the attempts made to improve the agreement of the low-abundance models with the Sun and discuss how helioseismology is being used to determine the solar heavy-element abundances. A review of current literature shows that attempts to improve agreement between solar models with low heavy-element abundances and seismic inference have been unsuccessful so far. The low-metallicity models that have the least disagreement with seismic data require changing all input physics to stellar models beyond their acceptable ranges. Seismic determinations of the solar heavy-element abundances yield results that are consistent with the older, higher values of the solar abundance, and hence, no major changes to the inputs to solar models are required to make higher-metallicity solar models consistent with the helioseismic data. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码:217 / 283
页数:67
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