189 citations · 455 across the 8 of their papers we have counts for
8 papers
The intermediate r-process in core-collapse supernovae driven by the magneto-rotational instability
Nobuya Nishimura, Hidetomo Sawai, Tomoya Takiwaki +2
We investigated r-process nucleosynthesis in magneto-rotational supernovae, based on a new explosion mechanism induced by the magneto-rotational instability. A series of axisymmetr…
The Evolution and Impacts of Magnetorotational Instability in Magnetized Core-Collapse Supernovae
Hidetomo Sawai, Shoichi Yamada
We carried out 2D-axisymmetric MHD simulations of core-collapse supernovae for rapidly-rotating magnetized progenitors. By changing both the strength of the magnetic field and the…
The Outcome of Supernovae in Massive Binaries; Removed Mass, and its Separation Dependence
Ryosuke Hirai, Hidetomo Sawai, Shoichi Yamada
The majority of massive stars are formed in binary systems. It is hence reasonable to expect that most core-collapse supernovae (CCSNe) take place in binaries and the existence of…
Influence of Magnetorotational Instability on Neutrino Heating: A New Mechanism for Weakly Magnetized Core-Collapse Supernovae
Hidetomo Sawai, Shoichi Yamada
We investigated the impacts of magnetorotational instability (MRI) on the dynamics of weakly magnetized, rapidly rotating core-collapse by conducting high resolution MHD simulation…
Global Simulations of Magnetorotational Instability in The Collapsed Core of A Massive Star
Hidetomo Sawai, Shoichi Yamada, Hideyuki Suzuki
We performed the first numerical simulations of magnetorotational instability from a sub-magnetar-class seed magnetic field in core collapse supernovae. As a result of axisymmetric…
Effects of Resistivity on Magnetized Core-Collapse Supernovae
Hidetomo Sawai, Shoichi Yamada, Kei Kotake +1
We studied roles of a turbulent resistivity in the core-collapse of a strongly magnetized massive star, carrying out 2D-resistive-MHD simulations. The three cases with different in…
Numerical Simulations of Equatorially-Asymmetric Magnetized Supernovae: Formation of Magnetars and Their Kicks
Hidetomo Sawai, Kei Kotake, Shoichi Yamada
A series of numerical simulations on magnetorotational core-collapse supernovae are carried out. Dipole-like configurations which are offset northward are assumed for the initially…
The Core-Collapse Supernova with "Non-Uniform" Magnetic Fields
Hidetomo Sawai, Kei Kotake, Shoichi Yamada
We perform two-dimensional numerical simulations on the core-collapse of a massive star with strong magnetic fields and differential rotations using a numerical code ZEUS-2D. Chang…