Radio emission during the interaction between two coronal mass ejections in the interplanetary medium

Abstract:

We present a study of representative cases of interaction between two coronal mass ejections traveling into the interplanetary medium and directed towards the Earth. Using an analytical model, in which the interaction region dynamic and evolution is included, we can predict the ICME-ICME interaction time and the arrival time and velocity of the merged structure at 1 AU. With a numerical model we obtained the density as function of heliospheric distance and we estimated the radio wave frequencies expected. With this information, we looked for low frequency radio emission observed by WIND/WAVES related to the interaction.