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 ∼445±6 km s−1, which we call coronal Moreton wave, and a slower wave with a speed of ∼298±5 km s−1, 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.
Cite
@article{arxiv.2106.14024,
title = {Fine Structures of an EUV Wave Event from Multi-Viewpoint Observations},
author = {Ramesh Chandra and P. F. Chen and Pooja Devi and Reetika Joshi and Brigette Schmieder and Yong-Jae Moon Wahab Uddin},
journal= {arXiv preprint arXiv:2106.14024},
year = {2021}
}
Comments
08 pages, 08 figures, accepted for publication in ApJ