150 citations · 1.2k across the 25 of their papers we have counts for
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Generation of twist on magnetic flux tubes at the base of the solar convection zone
H. Hotta, T. Yokoyama
Using two-dimensional magnetohydrodynamics calculations, we investigate a twist gen- eration mechanism on a magnetic flux tube at the base of the solar convection zone based on the…
Magnetic field intensification by three-dimensional explosion process
H. Hotta, M. Rempel, T. Yokoyama
We investigate an intensification mechanism for the magnetic field near the base of the solar convection zone that does not rely on differential rotation. Such mechanism in additio…
Detection of flux emergence, splitting, merging, and cancellation of network field. I Splitting and Merging
Y. Iida, H. Hagenaar, T. Yokoyama
Frequencies of magnetic patch processes on supergranule boundary, namely flux emergence, splitting, merging, and cancellation, are investigated through an automatic detection. We u…
Estimation of turbulent diffusivity with direct numerical simulation of stellar convection
H. Hotta, Y. Iida, T. Yokoyama
We investigate the value of horizontal turbulent diffusivity η by numerical calculation of thermal convection. In this study, we introduce a new method whereby the turbulent diffus…
Detection of the Horizontal Divergent Flow prior to the Solar Flux Emergence
S. Toriumi, K. Hayashi, T. Yokoyama
It is widely accepted that solar active regions including sunspots are formed by the emerging magnetic flux from the deep convection zone. In previous numerical simulations, we fou…
Large-scale 3D MHD simulation on the solar flux emergence and the small-scale dynamic features in an active region
S. Toriumi, T. Yokoyama
We have performed a three-dimensional magnetohydrodynamic simulation to study the emergence of a twisted magnetic flux tube from -20,000 km of the solar convection zone to the coro…
Numerical Calculation of Convection with Reduced Speed of Sound Technique
H. Hotta, M. Rempel, T. Yokoyama +2
Context. The anelastic approximation is often adopted in numerical calculation with low Mach number, such as stellar internal convection. This approximation requires frequent globa…