Evolution & Dynamics of Solar Active Prominence
The life of a solar active prominence, one of the most remarkable objects observed on the Sun, is
full of dynamics; after appearing in the solar corona, the prominence continuously evolves to show internal motions and eventually produce global eruption toward the interplanetary
space. We performed a three-dimensional MHD simulation for reproducing evolution of the prominence from formation to eruption, and investigated underlying dynamic
processes respnsible for its observed features. These processes were the emergence of U-loop coupled with rising & diverging
subsurface flows and the submergence of U-loop coupled with sinking & converging subsurface flows, both of which produced flux cancellation in the
photosphere. Observed but somewhat counterintuitive strong upflows could be driven
against gravity by enhanced gas pressure gradient force along a magnetic field line
locally standing vertical. The most highlighted dynamic event reproduced in the simulation, the global eruption, occurred as a result of positive feedback between draining of plasma and rising of field line.
Reference
Magara, T. 2015, PASJ, 67, L5
Schmieder, B. et al. 1984, A&A, 136, 81
Evolution of the prominence.