Five-minute oscillations of photospheric and chromospheric swirls
Five-minute oscillations of photospheric and chromospheric swirls
复制标题
光球和色球漩涡的五分钟振荡
DOI：
10.1051/0004-6361/202245373
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发表时间：
2023
影响因子：
6.5
通讯作者：
Liu J
中科院分区：
文献类型：
--
作者：
Liu J
涡旋在太阳大气中无处不在。它们被认为与不同模式的磁流体动力波和脉冲以及针状体的激发有关。然而，对它们集体行为的统计研究很少。我们的目的是研究由自动旋流检测算法（ASDA）从瑞典1米太阳望远镜和日野卫星获得的观测数据中检测到的光球和色球旋流的集体和个体行为。方法对光球和色球涡旋的6个参数进行小波分析。发现了两个周期具有显著小波功率的簇，一个在3 ~ 8 min，另一个在10 ~ 14 min。前者与全球模谱的支配期一致。小波变换和快速傅立叶变换分析也发现了类似的周期。结果这些结果表明，全球模态可能在引发光球和色球漩涡中起重要作用。然后提出了一种全球模态通过产生漩涡、阿尔夫萨芬脉冲和针状体向太阳上层大气提供能量和质量通量的新情景。
ContextSwirls are ubiquitous in the solar atmosphere. They are thought to be related to the excitation of different modes of magnetohydrodynamic waves and pulses, as well as spicules. However, statistical studies of their collective behaviour are rare.AimsWe aim to study the collective as well as the individual behaviour of photospheric and chromospheric swirls detected by the automated swirl detection algorithm (ASDA) from observations obtained by the Swedish 1-m Solar Telescope and the Hinode satellite.MethodsWe performed a detailed analysis of six different parameters of photospheric and chromospheric swirls with the wavelet analysis. Two clusters with periods with significant wavelet power, one from 3 − 8 min and the other from 10 − 14 min, were found. The former coincides with the dominant period of the globalp-mode spectrum. The wavelet and fast Fourier transform analysis of example swirls also revealed similar periods.ResultsThese results suggest that globalp-modes might be important in triggering photospheric and thus chromospheric swirls. A novel scenario of globalp-modes providing energy and mass fluxes to the upper solar atmosphere via generating swirls, Alfvén pulses, and spicules is then proposed.