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arXiv 2304.07970astro-ph.SR
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关于光球层和色球层涡旋的5分钟振荡

On the 5-Minute Oscillations of Photospheric and Chromospheric Swirls

Jiajia Liu, David Jess, Robert Erdélyi, Mihalis Mathioudakis

AI总结:

本文通过小波分析研究光球和色球涡旋的集体与个体行为,发现3-8分钟和10-14分钟两个周期簇,提出全球p模通过产生涡旋等向上层大气输送能量和质量的新机制。

摘要:

涡旋在太阳大气中普遍存在。它们被认为与磁流体动力学波和脉冲的不同模式以及针状体的激发有关。然而,关于它们集体行为的统计研究很少。在本文中,我们旨在研究由瑞典1米太阳望远镜和Hinode卫星观测得到的自动涡旋检测算法(ASDA)检测到的光球层和色球层涡旋的集体行为以及个体行为。采用小波分析对光球层和色球层涡旋的六个不同参数进行了详细分析。发现了两个具有显著小波功率的周期簇,一个来自3-8分钟,另一个来自10-14分钟。前者与全球p模谱的主周期一致。对示例涡旋的小波和快速傅里叶变换(FFT)分析也揭示了相似的周期。这些结果表明,全球p模可能对触发光球层进而触发色球层涡旋很重要。随后提出了一种新的情景,即全球p模通过产生涡旋、阿尔芬脉冲和针状体向上层太阳大气提供能量和质量通量。

英文摘要:

Swirls are ubiquitous in the solar atmosphere. They are believed 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. In this paper, we aim to study the collective, as well as the behaviour of individual 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. Detailed analysis of six different parameters of photospheric and chromospheric swirls is performed employing the wavelet analysis. Two clusters of periods with significant wavelet power, one from $3-8$ minutes and the other from $10-14$ minutes, have been found. The former coincides with the dominant period of the global $p$-mode spectrum. Wavelet and Fast Fourier Transform (FFT) analysis of example swirls also reveals similar periods. These results suggest that global $p$-modes might be important for triggering photospheric and thus chromospheric swirls. A novel scenario of global $p$-modes providing energy and mass fluxes to the upper solar atmosphere via generating swirls, Alfvén pulses and spicules is then proposed.

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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