摘要
Several envelope soliton fine structures have been observed in solar radio metric-wave emission.present a model of longitudinal modulational instability to explain these fine structures.It is found that this instability can only occur in the condition of sound velocity being larger than Alfvin velocity in corona.Therefore,the envelope soliton fine structures should display in the coronal region with high temperature and low magnetic 6eld,which corresponds to the solar radio emission in the region of meter and decameter wavelength.
作者
WANG De-Yu
G.P.Chernov
王德焴;G.P.Chernov(Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210008;National Astronomical Observatories,Chinese Academy of Sciences;IZMIRAN,142092 Troitask,Moscow Region,Russia)
基金
Supported by the National Natural Science Foundation of China under Grant No.19803050.