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arXiv 1606.09020astro-ph.SR
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日珥和日冕环束中阻尼的大振幅振荡

Damped large amplitude oscillations in a solar prominence and a bundle of coronal loops

Quanhao Zhang, Yuming Wang, Rui Liu, Chenglong Shen, Min Zhang, Tingyu Gou, Jiajia Liu, Kai Liu, Zhenjun Zhou, Shui Wang

摘要:

我们研究了2012年9月22日SDO/AIA观测到的太阳东翼附近的两个双折射(P1,P2)和两束冕环(L1,L2)的演化。结果表明,P1和L1有大幅度的振荡,而P2和L2没有可检测到的运动。这些横向振荡是由一个大规模的日冕波触发的,起源于太阳边缘后面一个遥远的活动区域的大耀斑。通过仔细比较这些振荡和非振荡结构的位置和高度,我们得出结论,波的传播高度在50微米和130微米之间。波能量沉积在振荡的日珥和冕环至少是$10^{28}$尔格的顺序。此外,局部磁场强度和阿尔文速度来自振荡周期和阻尼时间尺度,这是从振荡的时间序列中提取的。结果表明,振荡不仅可以用于冠状地震学,而且可以揭示波的性质。

英文摘要:

We investigate the evolutions of two prominences (P1,P2) and two bundles of coronal loops (L1,L2), observed with SDO/AIA near the east solar limb on 2012 September 22. It is found that there were large-amplitude oscillations in P1 and L1, but no detectable motions in P2 and L2. These transverse oscillations were triggered by a large-scale coronal wave, originating from a large flare in a remote active region behind the solar limb. By carefully comparing the locations and heights of these oscillating and non-oscillating structures, we conclude that the propagating height of the wave is between 50 Mm and 130 Mm. The wave energy deposited in the oscillating prominence and coronal loops is at least of the order of $10^{28}$ erg. Furthermore, local magnetic field strength and Alfvén speeds are derived from the oscillating periods and damping time scales, which are extracted from the time series of the oscillations. It is demonstrated that oscillations can be used in not only coronal seismology, but also revealing the properties of the wave.

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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