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Impact of Dynamic State on the Mass Condensation Rate of Solar Prominences
Takafumi Kaneko, Takaaki Yokoyama
The interiors of quiescent prominences are filled with turbulent flows. The evolution of upflow plumes, descending pillars, and vortex motions has been clearly detected in high-res…
ALMA Observations of the Solar Chromosphere on the Polar Limb
Takaaki Yokoyama, Masumi Shimojo, Takenori J. Okamoto +1
We report the results of the Atacama Large Millimeter/sub-millimeter Array (ALMA) observations of the solar chromosphere on the southern polar limb. Coordinated observations with t…
Anisotropic magnetohydrodynamic turbulence driven by parametric decay instability: the onset of phase mixing and Alfvén wave turbulence
Munehito Shoda, Takaaki Yokoyama
We conduct a three-dimensional magnetohydrodynamic (MHD) simulation of the parametric decay instability of Alfvén waves and resultant compressible MHD turbulence, which is likely t…
Frequency-dependent Alfvén-wave propagation in the solar wind: Onset and suppression of parametric decay instability
Munehito Shoda, Takaaki Yokoyama, Takeru K. Suzuki
Using numerical simulations, we investigate the onset and suppression of parametric decay instability (PDI) in the solar wind, focusing on the suppression effect by the wind accele…
High-frequency spicule oscillations generated via mode conversion
Munehito Shoda, Takaaki Yokoyama
Spicule oscillations involve high-frequency components with a typical period approximately corresponding to s. The typical time scale of the photospheric oscillation is a f…