27 citations · 87 across the 5 of their papers we have counts for
4 papers · 1 filter
Dust Motion and Possibility of Dust Growth in a Growing Circumstellar Disk
Shunta Koga, Masahiro N. Machida
We calculate the evolution of a star-forming cloud core using a three-dimensional resistive magnetohydrodynamics simulation, treating dust grains as Lagrangian particles, to invest…
Dust coagulation and fragmentation in a collapsing cloud core and their influence on non-ideal magnetohydrodynamic effects
Yoshihiro Kawasaki, Shunta Koga, Masahiro N. Machida
We determine the time evolution of the dust particle size distribution during the collapse of a cloud core, accounting for both dust coagulation and dust fragmentation, to investig…
Growth of Magnetorotational Instability in Circumstellar Disks around Class 0 Protostars
Yoshihiro Kawasaki, Shunta Koga, Masahiro N. Machida
We investigate the possibility of the growth of magnetorotational instability (MRI) in disks around Class 0 protostars. We construct a disk model and calculate the chemical reactio…
Dependence of Hall Coefficient on Grain Size and Cosmic Ray Rate and Implication for Circumstellar Disk Formation
Shunta Koga, Yusuke Tsukamoto, Satoshi Okuzumi +1
The Hall effect plays a significant role in star formation because it induces rotation in the infalling envelope, which in turn affects the formation and evolution of the circumste…