What drives solar-EUV jets seen in equatorial coronal holes?

AbstractRecent observations of jets in solar coronal holes that include multi-wavelength data such as EUV movies have shown that most of those jets are not driven in the way suggested by the standard model. The standard model proposes that new, closed magnetic field emerges from below the solar surface to interact with already-existing magnetic field that extends high into the corona. Evidence provided by the EUV movies however, shows that the jet is driven out along the ambient field by the eruption of stressed, closed field that has built up at the base of the jet and that the eruption carries a clump of relatively cool solar plasma (called a minifilament) in its core. Our research suggests that the stressed base field is both built up, and triggered to erupt by magnetic flux cancellation, not field emergence. The explosive field in many other solar eruptions of all sizes is built up and triggered in a similar way. We show one example of flux cancellation that leads to a jet in a coronal hole, using data from the Solar Dynamics Observatory (SDO)