10:46 〜 11:08
[PEM14-05] From Fundamental Theory to Realistic Modeling of the Birth of Solar Eruptions
★Invited Papers
キーワード：Coronal mass ejections, Solar flares, Magnetohydrodynamics
Solar eruptions, primarily in the form of solar flares and coronal mass ejections, represent explosive releases of magnetic energy stored in the solar corona, with the potential to drive severe space weather. The initiation of solar eruptions remains an open question, leading to various theoretical models that are inferred from observations. However, these models are subjects of debate due to the absence of direct measurements of the three-dimensional magnetic fields in the corona. Numerical simulations, based on solving magnetohydrodynamics (MHD) equations that govern the macroscopic dynamics of solar corona, serve as a touchstone for testing these theoretical models. Here we will present recent advancements in our quest to establish a fundamental mechanism with both simplicity and efficacy for the initiation of solar eruptions, based on numerical MHD simulations. Our proposed mechanism centers around the gradual development of an internal current sheet within a continuously sheared magnetic arcade as driven by photospheric motions and fast reconnection at this current sheet initiating alone the eruption without the need of other factors. Recently, the modelling of the birth of solar eruption using observed data-based MHD simulations has advanced rapidly, becoming a crucial research tool in the study of the initiation mechanisms. These realistic modellings reveal a higher level of complexity compared to all currently available theories and idealized models. We will also review briefly the progresses in data-driven MHD simulations of the initiation process of solar eruptions.