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arXiv 0811.2424astro-ph
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太阳中微子和太阳组成问题

Solar neutrinos and the solar composition problem

Carlos Pena-Garay, Aldo Serenelli

摘要:

标准太阳模型(SSM)目前面临着一个新的难题:太阳成分问题。太阳能金属丰度的新测定导致SSM计算与日震测量相冲突,显示出从对流区延伸到太阳核心的差异,并且不能容易地分配给太阳对流区建模中的缺陷。我们提出了更新的太阳中微子通量和不确定性与高(旧)和低(新)太阳金属丰度测定两个SSM。铁和碳丰度的不确定性对太阳中微子通量的不确定性贡献最大。在CNO中微子通量的非成分不确定性中,^14N+p -> ^15O+g速率的不确定性是最大的。我们提出了一个独立的方法来帮助识别哪个SSM是正确的。目前的中微子数据不能区分这两个模型的太阳中微子预测,但正在进行的测量可以帮助解决这个难题。

英文摘要:

Standard solar models (SSM) are facing nowadays a new puzzle: the solar composition problem. New determinations of solar metal abundances lead SSM calculations to conflict with helioseismological measurements, showing discrepancies that extend from the convection zone to the solar core and can not be easily assigned to deficiencies in the modelling of the solar convection zone. We present updated solar neutrino fluxes and uncertainties for two SSM with high (old) and low (new) solar metallicity determinations. The uncertainties in iron and carbon abundances are the largest contribution to the uncertainties of the solar neutrino fluxes. The uncertainty on the ^14N+p -> ^15O+g rate is the largest of the non-composition uncertainties to the CNO neutrino fluxes. We propose an independent method to help identify which SSM is the correct one. Present neutrino data can not distinguish the solar neutrino predictions of both models but ongoing measurements can help to solve the puzzle.

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