Applied Mathematics Seminars: The Breakout Jet Model for Solar Coronal Jets with Filaments
21 October 2016 14:00 in CM219
The solar corona, the sun’s hot outer atmosphere, is a hotbed of activity driven by continual changes in the magnetic field that permeates it. In the largest events, free energy is stored in the corona in the form of filaments – long snake-like features with highly sheared magnetic fields. These filaments can become unstable and erupt outwards into interplanetary space as Coronal Mass Ejections (CMEs). A multitude of smaller jet-like events are also present which launch hot tapered spires of plasma up from near the surface. Although smaller, these events are much more plentiful and extend down to the finest scales resolvable by current instruments. Until recently, jets and CMEs were thought to be distinct phenomena resulting from quite different mechanisms. However, the latest observations suggest that some jets are in fact miniature CMEs. In this talk I will introduce a new model for these mini-CME-type jets based on high-resolution MHD simulations. I’ll discuss how this jet model is a natural extension of a prominent CME model and how this shows the direct link between the two phenomena for the first time.
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This seminar series is the continuation of the Numerical Analysis Seminar series that ran until August 2016. This change of name reflects the broader interests of the Applied Mathematics group (note that the Mathematical and Theoretical Particle Physics group also has a seminar series).