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Understanding the Physical Nature of Coronal EIT Waves

机译:了解冠状 EIT波的物理性质

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摘要

For almost 20 years the physical nature of globally propagating waves in the solar corona (commonly called “EIT waves”) has been controversial and subject to debate. Additional theories have been proposed over the years to explain observations that did not agree with the originally proposed fast-mode wave interpretation. However, the incompatibility of observations made using the Extreme-ultraviolet Imaging Telescope (EIT) onboard the Solar and Heliospheric Observatory with the fast-mode wave interpretation was challenged by differing viewpoints from the twin Solar Terrestrial Relations Observatory spacecraft and data with higher spatial and temporal resolution from the Solar Dynamics Observatory. In this article, we reexamine the theories proposed to explain EIT waves to identify measurable properties and behaviours that can be compared to current and future observations. Most of us conclude that the so-called EIT waves are best described as fast-mode large-amplitude waves or shocks that are initially driven by the impulsive expansion of an erupting coronal mass ejection in the low corona.
机译:在将近20年的时间里,日冕中全球传播的波(通常称为“ EIT波”)的物理性质一直是有争议的,并存在争议。这些年来,已经提出了其他理论来解释与最初提出的快速模式波解释不一致的观测结果。但是,太阳和日球天文台上使用极紫外成像望远镜(EIT)进行的快速模式波解释所产生的观测结果不兼容,受到双太阳地关系天文台航天器以及具有更高时空数据的观点的挑战。太阳动力学天文台的分辨率。在本文中,我们将重新研究提出的用于解释EIT波的理论,以识别可与当前和将来的观测结果进行比较的可测量特性和行为。我们大多数人得出的结论是,所谓的EIT波最好描述为快速模式的大振幅波或激波,其最初是由低日冕中爆发的日冕物质抛射的脉冲扩展驱动的。

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