Coronal Waves Interact With Coronal Structures

Since Coronal waves were firstly discovered, it is a hot topic about that thecoronal wave is a true wave or not. Until now, there is not a consistent conclusion. OnAugust4,2011, the Solar Dynamics Observatory observed a coronal wave in193channel. It is found that the coronal wave interacted with several coronal structuresthrough studying this coronal waves. When the coronal wave encountered a filamentchannel, part of the coronal wave was reflected and another part of the coronal wavecontinued propagating along the original direction. The coronal wave passed through anactive region with a high velocity and a new semi-arc bright wave front was found.Based on our analysis, we think it may be the coronal wave was refracted by the activeregion. After the refracted wave passed through the active region, this coronal wavefront was observed again with a new semi-arc bright wave front. The reflectionhappened twice when the coronal wave interacted with two coronal bright structures.The reflection of coronal wave by filament channel and coronal bright structures andthe refraction of coronal wave by active region imply that this coronal wave may be atrue wave.