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arXiv 0909.3955astro-ph.SR
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从太阳黑子记录破译太阳turbulence

Deciphering solar turbulence from sunspots records

Franck Plunian, Graeme Sarson, Rodion Stepanov

摘要:

一般认为,太阳黑子是太阳内部磁通量管的出射部分。这些管在对流区的底部产生,由于它们的磁浮力而上升到表面。对流区中等离子体的运动是高度湍流的,太阳黑子的表面表现可能保留了这种湍流的特征,包括它的不稳定性。根据对太阳黑子的直接观察以及对树轮中宇宙成因同位素$^{14}$ C或极地冰中$^{10}$ Be浓度的间接观察,绘制了频率功率谱密度。根据太阳是静止还是活跃,出现了两种不同的频率标度。%磁活动为最大或最小。从直接观察,我们也可以计算标度指数。这证明了一个强的不稳定性,可以与在太阳风中观察到的相媲美。

英文摘要:

It is generally believed that sunspots are the emergent part of magnetic flux tubes in the solar interior. These tubes are created at the base of the convection zone and rise to the surface due to their magnetic buoyancy. The motion of plasma in the convection zone being highly turbulent, the surface manifestation of sunspots may retain the signature of this turbulence, including its intermittency. From direct observations of sunspots, and indirect observations of the concentration of cosmogenic isotopes $^{14}$C in tree rings or $^{10}$Be in polar ice, power spectral densities in frequency are plotted. Two different frequency scalings emerge, depending on whether the Sun is quiescent or active. %magnetic activity is maximum or minimum. From direct observations we can also calculate scaling exponents. These testify to a strong intermittency, comparable with that observed in the solar wind.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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