MPS Seminar: Eruptions driven by magnetic Flux Emergence in a Coronal Hole Environment (K. Galsgaard)

Magnetic flux emergence in to an existing coronal magnetic configuration represents one of the simplest ways to generate fast magnetic energy release processes. When the coronal magnetic field contains the favourable configurations different eruptions may take place forming simple jet like features or ejections of flux robes in the from a CMEs. This talk discusses the evolution of a magnetic flux emergence into a simple unipolar magnetic field using 3D non-ideal MHD modelling. The simple model gives rise to a much more complicated temporal evolution than expected. After a longer steady state jet phase the system reaches a phase where five eruptions take place. These are discussed in terms of the stressing of the system as it approaches the instability and the eruptions impact on the ambient magnetic field.