首页> 外文期刊>Studia Universitatis Babes-Bolyai. Series Physica >INTERACTIONS OF EIT WAVES WITH GRAVITATIONALLYSTRATIFIED CORONAL LOOPS
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INTERACTIONS OF EIT WAVES WITH GRAVITATIONALLYSTRATIFIED CORONAL LOOPS

机译:EIT波与重力分层冠状环的相互作用

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In this paper we studied the effect of interactions of EIT waves (global waves observed in the solar corona in the extreme ultraviolet band filter) with gravitationally stratified coronal loops, considering a particular analytical form for the density variation along the loop. We investigated how the transverse and longitudinal generated oscillations depend on the nature of the EIT wave and the parameters characterizing the coronal loop. The coronal loop was approximated with a straight magnetic flux tube with fixed ends and the EIT wave with a pulse in space. The medium inside the magnetic flux tube was described by a cosecant profile of the density. The basic mathematical tool used was linear MHD. Both analytical and graphical results show a strong connection between EIT periods and normal modes of oscillations of the flux tube. HeunC functions appear as ingredients for describing both the longitudinal and transversal oscillations. The amplitudes of these oscillations depend both on the energy of the incident wave as well as on the gravitational constant.
机译:在本文中,我们研究了EIT波(在极端紫外线波段滤光片中在日冕中观测到的全局波)与重力分层冠状环之间的相互作用,并考虑了沿环密度变化的特定分析形式。我们研究了横向和纵向产生的振荡如何取决于EIT波的性质以及表征冠状环的参数。用固定端的直磁通管和空间脉冲的EIT波近似冠状环。磁通管内部的介质由密度的正割曲线描述。使用的基本数学工具是线性MHD。分析结果和图形结果均显示EIT周期与通量管振荡的正常模式之间有很强的联系。 HeunC函数作为描述纵向和横向振荡的成分而出现。这些振荡的幅度既取决于入射波的能量,又取决于重力常数。

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