NEW SOLAR COMPOSITION: THE PROBLEM WITH SOLAR MODELS REVISITED

被引:311
作者
Serenelli, Aldo M. [1 ]
Basu, Sarbani [2 ]
Ferguson, Jason W. [3 ]
Asplund, Martin [1 ]
机构
[1] Max Planck Inst Astrophys, D-85471 Garching, Germany
[2] Yale Univ, Dept Astron, New Haven, CT 06520 USA
[3] Wichita State Univ, Dept Phys, Wichita, KS 67260 USA
来源
ASTROPHYSICAL JOURNAL LETTERS | 2009年 / 705卷 / 02期
关键词
neutrinos; Sun: abundances; Sun: helioseismology; Sun: interior; DEGREE P-MODES; SEPARATION RATIOS; HELIOSEISMOLOGY; ABUNDANCES; OPACITIES; INTERIOR; STATE; CONSTRAINTS; NEUTRINOS; EQUATION;
D O I
10.1088/0004-637X/705/2/L123
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We construct updated solar models with different sets of solar abundances, including the most recent determinations by Asplund et al. The latter work predicts a larger (similar to 10%) solar metallicity compared to previous measurements by the same authors but significantly lower (similar to 25%) than the recommended value from a decade ago by Grevesse & Sauval. We compare the results of our models with determinations of the solar structure inferred through helioseismology measurements. The model that uses the most recent solar abundance determinations predicts the base of the solar convective envelope to be located at R(CZ) = 0.724 R(circle dot) and a surface helium mass fraction of Y(surf) = 0.231. These results are in conflict with helioseismology data (R(CZ) = 0.713 +/- 0.001 R(circle dot) and Y(surf) = 0.2485 +/- 0.0035) at 5 sigma and 11 sigma levels, respectively. Using the new solar abundances, we calculate the magnitude by which radiative opacities should be modified in order to restore agreement with helioseismology. We find that a maximum change of similar to 15% at the base of the convective zone is required with a smooth decrease toward the core, where the change needed is similar to 5%. The required change at the base of the convective envelope is about half the value estimated previously. We also present the solar neutrino fluxes predicted by the new models. The most important changes brought about by the new solar abundances are the increase by similar to 10% in the predicted (13)N and (15)O fluxes that arise mostly due to the increase in the C and N abundances in the newly determined solar composition.
引用
收藏
页码:L123 / L127
页数:5
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