Evolution & Dynamics of Solar Active Prominence
Life of the solar active prominence, a plasma cloud observed in a solar atmosphere is
full of dynamics; after appearing in the atmosphere, the prominence continuously evolves to show internal motions and eventually produce global eruption toward an interplanetary
space. We performed a three-dimensional MHD simulation of flux emergence to reproduce the evolution of the prominence from formation to eruption, and investigated underlying dynamic
processes responsible for those observed features of the prominence: flux cancellation, strong upflows, global eruption. The simulation showed that both emergence of U-loop coupled with rising & diverging
subsurface flows and submergence of U-loop coupled with sinking & converging subsurface flows produced flux cancellation in the
photosphere. It also showed that observed but somewhat counterintuitive strong upflows was driven
against gravity by enhanced gas pressure gradient force along a magnetic field line (magnetic loop)
locally standing vertical. The most highlighted dynamic event, the global eruption occurred as a result of positive feedback between draining of plasma and rising of magnetic loop.
Reference
Magara, T. 2015, PASJ, 67, L5
Schmieder, B. et al. 1984, A&A, 136, 81
Evolution of simulated prominence.