Three‐dimensional outflow jets generated in collisionless magnetic reconnection

The present study proposes a new theoretical model generating three‐dimensional (3‐D) outflow jets in collisionless magnetic reconnection by means of a large‐scale particle‐in‐cell simulation. The key mechanism is the formation of 3‐D flux ropes arising in the turbulent electron current layer formed around the magnetic x line. The scale of the flux ropes along the current density is determined by the wavelength of an electron flow shear mode which is a macroscopic scale larger than the typical kinetic scales. The 3‐D flux ropes are intermittently ejected from the current layer and regulates the outflow jets into three dimensions. The gross reconnection rate is sufficiently large, since reconnection takes place almost uniformly along the x line. Key Points A new theoretical model generating 3‐D outflow jets of reconnection is proposed The width of the outflow channels is consistent with the observations of BBFs The macroscopic structure of the reconnection jets is controlled by electron dynamics