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Coronal Oscillations above Sunspots?

机译:黑子上方的日冕振荡?

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摘要

Observational data clearly indicate the presence of 3-min oscillations in sunspots in spectral lines covering a vast temperature range from the low chromosphere to those lines normally associated with coronal temperatures. We show that after folding in the sunspot plume emission measure distribution, the contribution functions for lines normally formed just below 1×106 K are shifted to lower temperatures. For example, the Fe ix 171 Å line is shifted to 6×105 K for a Maxwellian distribution and to less than 5×105 K with a non-Maxwellian distribution. Other lines such as Mg ix 368 Å will also be affected. This then questions some previous work regarding the suggested detection of 3-min oscillations in the corona above sunspots.
机译:观测数据清楚地表明,在从低色球层到通常与日冕温度相关的那些广泛温度范围内的光谱线中,黑子中存在3分钟的振荡。我们发现,在折叠黑子羽状排放量分布后,通常在刚好低于1×106 K的情况下形成的线的贡献函数会转移到较低的温度。例如,对于Maxwellian分布,Fe ix 171Å线偏移为6×105 K,对于非Maxwellian分布,偏移为小于5×105 K。 Mg ix 368Å等其他线路也将受到影响。然后,这对先前关于建议在黑子上方电晕中检测3分钟振荡的工作提出了质疑。

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  • 来源
    《Solar Physics》 |2003年第2期|79-84|共6页
  • 作者单位

    Armagh Observatory;

    Astronomical Institute Faculty of Mathematics Physics and Informatics Comenius University;

    Armagh Observatory;

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  • 正文语种 eng
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