6 papers
Proposal of a Novel Physical Parameter Characterizing Solar Wind Speed in a Wave-Driven Model
Kyogo Tokoro, Munehito Shoda, Shinsuke Imada
Empirical solar wind speed models play an important role in enabling space weather forecasting with low computational cost. Among these, one model called WS model is based on the a…
Influence of kinetic effects in large-scale magnetic reconnection with multi-hierarchy simulation code KAMMUY
Keita Akutagawa, Shinsuke Imada, Munehito Shoda
Magnetic reconnection is a multiscale phenomenon where fluid- and particle-scale processes interact. The particle-in-cell (PIC) method, capable of resolving kinetic (particle-scale…
Empirical Optimization of the Source-Surface Height in the PFSS extrapolation
Munehito Shoda, Kyogo Tokoro, Daikou Shiota +1
The potential field source surface (PFSS) method is a widely used magnetic field extrapolation technique in the space weather community. The only free parameter in the PFSS method…
A unified picture of swirl-driven coronal heating: magnetic energy supply and dissipation
Hidetaka Kuniyoshi, Shinsuke Imada, Takaaki Yokoyama
The coronal heating problem is one of the most critical challenges in solar physics. Recent observations have revealed that small-scale swirls are ubiquitous in the photosphere and…
Can plasmoid-mediated reconnection occur in collisionless systems?
Keita Akutagawa, Shinsuke Imada, Munehito Shoda
Magnetic reconnection is a process that converts magnetic energy into plasma energy by changing the magnetic field line topology. The outstanding question is why the reconnection r…
Observational Comparison Between Confined and Eruptive Flares: Magnetohydrodynamics Instability Parameters in a Similar Magnetic Configuration
Kouhei Teraoka, Daiki Yamasaki, Yusuke Kawabata +2
Unstable states of the solar coronal magnetic field structure result in various flare behaviors. In this study, we compared the confined and eruptive flares that occurred under sim…