Vol. 620
In section 9. The Sun

Ultrahigh-resolution model of a breakout CME embedded in the solar wind

An ejection of mass and magnetic field from the Sun, in other words, a coronal mass ejection (CME), is a global disturbance of the heliosphere that can also affect the Earth's magnetosphere. The actual driver of the eruption, and therefore the predictability of such events, is still poorly understood. Traditionally, reconnection in the current sheet in the center of the flare that is associated with the event has been thought to play the main role. The new simulations at ultrahigh resolution presented here show that reconnection at the edge of the ejection is the main driver that launches the CME.