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arXiv 2202.13147astro-ph.SR
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由EUV波激活的日珥振荡

Prominence Oscillations activated by an EUV wave

Pooja Devi, Ramesh Chandra, Reetika Joshi, P. F. Chen, Brigitte Schmieder, Wahab Uddin, Yong-Jae Moon

摘要:

日珥振荡是太阳大气中的一种有趣现象,它可以用来推断太阳大气中的嵌入磁场大小。本文利用太阳动力学观测卫星(SDO)上大气成像组件(AIA)的多波段数据,观测了2011年2月11日太阳东翼两个不同双折射的横向振荡。观测到日珥向东喷发,其平均速率约为275 km/s。火山爆发与时间的线性和指数函数相结合。极紫外(EUV)波事件与日珥爆发有关。这种极紫外波触发了东翼两个双折射的振荡。我们用小波分析方法计算了每个日珥的周期。振荡周期为14 ~ 22 min,计算了双折射的磁场,其变化范围为14 ~ 20 G。

英文摘要:

Prominence oscillations are one of interesting phenomena in the solar atmosphere, which can be utilized to infer the embedded magnetic field magnitude. We present here the transverse oscillations of two different prominences located at the East solar limb on 2011 February 11 using the multi-wavebands data of the Atmospheric Imaging Assembly (AIA) on-board the Solar Dynamics Observatory (SDO) satellite. A prominence eruption was observed towards the east direction with an average speed of ~275 km/s. The eruption is fitted with the combination of a linear and an exponential functions of time. An extreme ultraviolet (EUV) wave event was associated with the prominence eruption. This EUV wave triggered the oscillations of both prominences on the East limb. We computed the period of each prominence using the wavelet analysis method. The oscillation period varies from 14 to 22 min. The magnetic field of the prominences was derived, which ranges from 14 to 20 G.

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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