47 citations · 80 across the 2 of their papers we have counts for
6 papers
Axisymmetric Magnetorotational Instability in Viscous Accretion Disks
Youhei Masada, Takayoshi Sano
Axisymmetric magnetorotational instability (MRI) in viscous accretion disks is investigated by linear analysis and two-dimensional nonlinear simulations. The linear growth of the v…
The Effect of Neutrino Radiation on Magnetorotational Instability in Proto-Neutron Stars
Youhei Masada, Takayoshi Sano, Kazunari Shibata
Neutrino radiation takes a major role in the momentum, heat, and lepton transports in proto-neutron stars (PNSs). These diffusive processes affect the growth of magnetorotational i…
Nonaxisymmetric Magnetorotational Instability in Proto-Neutron Stars
Youhei Masada, Takayoshi Sano, Hideaki Takabe
We investigate the stability of differentially rotating proto-neutron stars (PNSs) with a toroidal magnetic field. Stability criteria for nonaxisymmetric MHD instabilities are deri…
Self-Sustained Ionization and Vanishing Dead Zones in Protoplanetary Disks
Shu-ichiro Inutsuka, Takayoshi Sano
We analyze the ionization state of the magnetohydrodynamically turbulent protoplanetary disks and propose a new mechanism of sustaining ionization. First, we show that in the quasi…
Angular Momentum Transport by MHD Turbulence in Accretion Disks: Gas Pressure Dependence of the Saturation Level of the Magnetorotational Instability
Takayoshi Sano, Shu-ichiro Inutsuka, Neal J. Turner +1
The saturation level of the magnetorotational instability (MRI) is investigated using three-dimensional MHD simulations. The shearing box approximation is adopted and the vertical…
A Local One-Zone Model of MHD Turbulence in Dwarf Nova Disks
Takayoshi Sano, James M. Stone
The evolution of the magnetorotational instability (MRI) during the transition from outburst to quiescence in a dwarf nova disk is investigated using three-dimensional MHD simulati…