太阳活动区的长周期波动

G. Dumbadze
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引用次数: 0

摘要

太阳活动区(ARs)的波动谱包含了导致这种背景振动噪声出现的几何特征和地面物理过程的信息。该研究基于对时间序列构建的光球磁图的分析,并包括几种类型的AR结构的案例研究。我们检测了太阳活动区面积和径向磁通时间序列的傅里叶和小波谱的特征性质。存在长周期振荡,类似于超粒化的特征寿命,分别由AR总面积和径向磁通量数据集确定。根据我们的研究结果,在不同的考虑情况下,AR区和径向磁通的波动谱在谱幂律指数的值以及它们的变异性范围上都有所不同。区域磁通波动谱和径向磁通波动谱的特征性质之间存在显著差异。在AR区和径向磁通振动谱形成的背后可能有不同的物理机制在起作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Long period fluctuations of solar active regions
The fluctuation spectra of solar active regions (ARs) contain information about the geometrical features and ground physical processes responsible for the appearance of such a background vibration noise. The investigation is based on an analysis of a time series built photospheric magnetograms and comprises case studies of several types of AR structures. We detect characteristic properties of Fourier and wavelet spectra evaluated for the solar active region area and radial magnetic flux time series. There are long-period oscillations, similarly to the characteristic lifetimes of super-granulation, determined from the datasets of the AR total area and radial magnetic flux, respectively. According to our results the fluctuation spectra of the AR areas and radial magnetic fluxes somewhat differ from each other both in terms of values of the spectral power-law exponents, as well as their variability ranges in different consider cases. The characteristic properties of the area and radial magnetic flux fluctuation spectra for the Ars show noticeable discrepancies between each other. It can also be concluded that behind the formation of AR area and radial flux vibration spectra might be different physical mechanisms in action.
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