Coronal extreme ultraviolet(EUV)waves are large-scale disturbances propagating in the corona and are closely associated with solar eruptions.They can disturb the ambient plasma over a wide temperature range,resulting ...Coronal extreme ultraviolet(EUV)waves are large-scale disturbances propagating in the corona and are closely associated with solar eruptions.They can disturb the ambient plasma over a wide temperature range,resulting in simultaneous observations in multiple EUV passbands,and the wavefronts are typically best observed in AIA 193 and 211Achannels with temperatures ranging from 1.6 to 2 MK.Here,we report a peculiar EUV wave that was invisible in the 193 and 211Abut appeared instead in AIA 171A,corresponding to a lower temperature.Driven by a coronal jet,the wave propagated at a speed of~560 kms^(-1).The differential emission measure(DEM)analysis shows that the emission of the wavefront concentrated at~1.25 MK,lower than the typical predominant temperatures.In addition,the fields extrapolated using the potential field source surface(PFSS)method indicate the existence of a typical pseudo-streamer structure.Hence,we propose that it is possibly the first case of an EUV wave occurring and propagating inside a pseudo-streamer,and its visibility is likely determined by the relatively cooler plasma within the pseudo-streamer.展开更多
基金supported by the National Natural Science Foundation of China(Grant No.12073016)。
文摘Coronal extreme ultraviolet(EUV)waves are large-scale disturbances propagating in the corona and are closely associated with solar eruptions.They can disturb the ambient plasma over a wide temperature range,resulting in simultaneous observations in multiple EUV passbands,and the wavefronts are typically best observed in AIA 193 and 211Achannels with temperatures ranging from 1.6 to 2 MK.Here,we report a peculiar EUV wave that was invisible in the 193 and 211Abut appeared instead in AIA 171A,corresponding to a lower temperature.Driven by a coronal jet,the wave propagated at a speed of~560 kms^(-1).The differential emission measure(DEM)analysis shows that the emission of the wavefront concentrated at~1.25 MK,lower than the typical predominant temperatures.In addition,the fields extrapolated using the potential field source surface(PFSS)method indicate the existence of a typical pseudo-streamer structure.Hence,we propose that it is possibly the first case of an EUV wave occurring and propagating inside a pseudo-streamer,and its visibility is likely determined by the relatively cooler plasma within the pseudo-streamer.
