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arXiv 1602.07598astro-ph.SR
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冠状环II中直立扭结模式的正演模拟。应用

Forward Modelling of Standing Kink Modes in Coronal Loops II. Applications

Ding Yuan, Tom Van Doorsselaere

摘要:

磁流体动力学波被认为在日冕加热中起着重要作用,并可用于太阳等离子体的远程诊断。加热和诊断的应用依赖于一个正确的反演(或向后建模)的可观测到的等离子体的热和磁结构。然而,由于可观测数据有限,这是一个不恰当的问题。前向建模是建立一个合理的映射等离子体结构到可观的。在这项研究中,我们建立了前向模型的常设扭结模式在日冕环和模拟光学薄的排放在极紫外带通,然后调整等离子体参数和视角,以匹配三个事件的横向环振荡观测到的太阳动力学天文台/大气成像组件。我们证明,前向模型可以有效地用于识别振荡泛音和偏振,再现振荡振幅和相位的一般配置文件,并预测多个谐波周期在相关的发射强度和环宽变化。

英文摘要:

Magnetohydrodynamic waves are believed to play a significant role in coronal heating, and could be used for remote diagnostics of solar plasma. Both the heating and diagnostic applications rely on a correct inversion (or backward modelling) of the observables into the thermal and magnetic structures of the plasma. However, owing to the limited availability of observables, this is an ill-posed issue. Forward Modelling is to establish a plausible mapping of plasma structuring into observables. In this study, we set up forward models of standing kink modes in coronal loops and simulate optically thin emissions in the extreme ultraviolet bandpasses, and then adjust plasma parameters and viewing angles to match three events of transverse loop oscillations observed by the Solar Dynamics Observatory/Atmospheric Imaging Assembly. We demonstrate that forward models could be effectively used to identify the oscillation overtone and polarization, to reproduce the general profile of oscillation amplitude and phase, and to predict multiple harmonic periodicities in the associated emission intensity and loop width variation.

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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