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arXiv 1607.06175astro-ph.SR
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太阳黑子半影区振荡层结的特殊性

Peculiarity of the oscillation stratification in sunspot penumbrae

D. Y. Kolobov, A. A. Chelpanov, N. I. Kobanov

摘要:

四个太阳黑子的主振荡频率的空间分布显示了这些太阳黑子中太阳大气层的所有分析水平所共有的特征。位于内半影的这一特征表明,该区域具有2.5-4兆赫振荡传播的有利条件。这与该区域三个大气高度(FeI 6173 ° C、1700 ° C和He II 304 ° C)振荡的光谱组成相似的事实相一致。以前有证据表明,沿光球磁场强度的高度,视线速度和温度分布的内部半影,其中的内部边界的Evershed流的位置特别相似。在从色球层到过渡区的高度范围内发现相同的主振荡频率,这扩大了高度范围,表明物理条件相似。

英文摘要:

Spatial distributions of the dominant oscillation frequency obtained for four sunspots show a feature shared by all the analysed levels of the solar atmosphere in these sunspots. This feature located in the inner penumbrae indicates that this region has favourable conditions for 2.5-4 mHz oscillation propagation. This agrees with the fact that the spectral composition of the oscillations at three atmospheric heights (FeI 6173Å, 1700Å, and He II 304Å) in this region are similar. There have been previous evidence of particular similarities along height of photospheric magnetic field strength, line-of-sight velocity, and temperature profile in the inner penumbra, where the internal boundary of the Evershed flow is located. The finding of the same dominant oscillation frequency at a range of altitudes from the chromosphere up to the transition region extends the height range, suggesting similarities in physical conditions.

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