Following the previous work that revealed how the magnetic compression proceeded via dynamic loop-loop interaction, we constructed a quantitative model of magnetic piston to make a detailed analysis of the loop-loop interaction that occurs in the magnetized atmosphere of the Sun. When adjacent emerging magnetic loops locally have different thermal and dynamic properties, a significant discrepancy between their translational motions driven by means of Lorentz force may arise, leading to the loop-loop interaction. We used numerical and analytic methods for examining magnetic piston-driven waves to evaluate how much a single event of the interaction could increase temperature in the upper chromosphere. The result showed a possibility that a chromospheric plasma is heated by the single event to have transition region temperature, which is typically several tens of times higher than chromospheric temperature. Our model demonstrated that the dynamic loop-loop interaction is a process of volume shrinkage with nonuniform acceleration caused by Lorentz force, providing an insight into the formation height of the transition region.
Reference
Magara, T.
Journal of the Korean Astronomical Society, 57, 239
*Plasma is essentially discontinous because it is composed of "Particles" which are discrete objects. When these particles collide with each other frequently enough to make a continuum approximation valid, the plasma is treated as continuous matter. On the other hand, magnetic field is "Field" which is essentially continuous.
For the derivation of this result, see this page.
