Fine Structures of an EUV Wave Event from Multi-Viewpoint Observations
arXiv:2106.14024 · doi:10.3847/1538-4357/ac1077
Abstract
In this study, we investigate an extreme ultraviolet (EUV) wave event on 2010 February 11, which occurred as a limb event from the Earth viewpoint and a disk event from the STEREO--B viewpoint. We use the data obtained by the Atmospheric Imaging Assembly (AIA) aboard the Solar Dynamics Observatory (SDO) in various EUV channels. The EUV wave event was launched by a partial prominence eruption. Similar to some EUV wave events in previous works, this EUV wave event contains a faster wave with a speed of 4456 km s, which we call coronal Moreton wave, and a slower wave with a speed of 2985 km s, which we call "EIT wave". The coronal Moreton wave is identified as a fast-mode wave and the "EIT wave" is identified as an apparent propagation due to successive field-line stretching. We also observe a stationary front associated with the fast mode EUV wave. This stationary front is explained as mode conversion from the coronal Moreton wave to a slow-mode wave near a streamer.
arXiv comment08 pages, 08 figures, accepted for publication in ApJ
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