Evolution of Collision Between the Counterstreaming Reconnection Jets During Multiple Reconnection.
Résumé
Magnetic reconnection may proceed via multiple reconnection sites which implies the collision between the counterstreaming reconnection jets. We present the magnetotail observations of two reconnection X lines and the region of the reconnection jets collision in between. Using favorable location of two Cluster spacecraft probes, we analyzed the evolution of collision process. Under strengthened collision, the ion-scale current sheet-like structure formed between the colliding jets, becomes compressed. The strong emission of whistler waves is observed in the center of the compressed structure. Such observations might be helpful in understanding the multiple reconnection dynamics at the magnetopause where the colliding reconnection jets in the core of the flux rope have been recently observed by MMS.