We have studied the dynamic evolution of current carrying magnetic structures responding to temporal changes of plasma flows and magnetic-field strength on the solar surface. These non-potential structures can be formed by a variety of mechanisms, such as plasma flows that twist the initially potential field and flux emergence. A commonly seen example is an arcade field with shear plasma motions at the footpoints of the field lines that result in a narrow current layer directly above the neutral line. We have found that magnetic tearing and possibly eruption of the structure can take place if there is a sudden change in surface plasma flows or magnetic field strength. This simple mechanism can be used as a model for some of the violent events in the corona.
AAS/Solar Physics Division Meeting #31
- Pub Date:
- May 2000