77 citations · 125 across the 13 of their papers we have counts for
14 papers
Impacts of hydrogen envelope on supernova fallback and the resulting compact remnant masses
Kengo Shinoda, Yudai Suwa, Ryosuke Hirai +4
Fallback in core-collapse supernovae plays a central role in setting compact-remnant masses and may produce late-time emission. In hydrogen rich progenitors, the reverse shock aris…
First VLBI Imaging of SiO , Masers in VY Canis Majoris
Hiroko Shinnaga, Miyako Oyadomari, Hiroshi Imai +8
We achieved the first VLBI detections of the ground vibrational state () SiO (hereafter, SiO) and SiO masers of the rotational transitions, to…
Red Giant Winds Driven by Alfvén Waves with Magnetic Diffusion
Takeru K. Suzuki, Keiichi Ohnaka, Yuki Yasuda
We investigate the driving mechanism of Alfvén wave-driven stellar winds from red giant stars, Arcturus ( Boo; K1.5 III) and Aldebaran ( Tau; K5 III), with nonideal MHD simul…
Spin-down of solar-mass protostars in magnetospheric accretion paradigm
Shinsuke Takasao, Masanobu Kunitomo, Takeru K. Suzuki +2
Stellar spin is one of the fundamental quantities that characterize a star itself and its planetary system. Nevertheless, stellar spin-down mechanisms in protostellar and pre-main-…
Spiral Magnetic Field and Their Role on Accretion Dynamics in the Circumnuclear Disk of Sagittarius A*: Insight from λ = 850 μm Polarization Imaging
Kazuki Sato, Hiroko Shinnaga, Ray S. Furuya +3
We showcase a study on the physical properties of the Circumnuclear Disk surrounding the Sgr A* of the Galactic Center, emphasizing the role of magnetic field (B field) with 0.47 p…
Effect of Magnetic diffusion in the Chromosphere on the Solar Wind
Masato Matsuoka, Takeru K. Suzuki, Takato Tokuno +1
We investigate non-ideal magnetohydrodynamical (MHD) effects in the chromosphere on the solar wind by performing MHD simulations for Alfvén-wave driven winds with explicitly includ…
A Novel Method to Constrain Tidal Quality Factor from A Non-synchronized Exoplanetary System
Takato Tokuno, Akihiko Fukui, Takeru K. Suzuki
We propose a novel method to constrain the tidal quality factor, , from an observed non-synchronized star-planet system consisting of a slowly rotating low-mass star and a clos…
Dynamics Near the Inner Dead-Zone Edges in a Proprotoplanetary Disk
Kazunari Iwasaki, Kengo Tomida, Shinsuke Takasao +2
We perform three-dimensional global non-ideal magnetohydrodynamic simulations of a protoplanetary disk containing the inner dead-zone edge. We take into account realistic diffusion…
Evolution of Tidal Disruption Event Disks with Magnetically Driven Winds
Mageshwaran Tamilan, Kimitake Hayasaki, Takeru K. Suzuki
We present a time-dependent, one-dimensional, magnetically-driven disk wind model based on magnetohydrodynamic (MHD) equations, in the context of tidal disruption events (TDEs). We…
Simulations of Protoplanetary Disk Dispersal: Stellar Mass Dependence of the Disk Lifetime
A. Komaki, S. Fukuhara, T. K. Suzuki +1
Recent infrared and submillimeter observations suggest that the protoplanetary disk lifetime depends on the central stellar mass. The disk dispersal is thought to be driven by visc…
The Evolution of High Temperature Plasma in Magnetar Magnetospheres and its Implications for Giant Flares
Makoto Takamoto, Shota Kisaka, Takeru Suzuki +1
In this paper we propose a new mechanism describing the initial spike of giant flares in the framework of the starquake model. We investigate the evolution of a plasma on a closed…
Diversity of the Supernova - Gamma-Ray Burst Connection
K. Nomoto, N. Tominaga, M. Tanaka +4
The connection between the long Gamma Ray Bursts (GRBs) and Type Ic Supernovae (SNe) has revealed interesting diversity. We review the following types of the GRB-SN connection. (1)…
Cascading of Fast-Mode Balanced and Imbalanced Turbulence
T. K. Suzuki, A. Lazarian, A. Beresnyak
We study the cascading of fast MHD modes in magnetically dominated plasma by performing one-dimensional (1D) dynamical simulations. We find that the cascading becomes more efficien…
Structured Red Giant Winds with Magnetized Hot Bubbles and the Corona/Cool Wind Dividing Line
Takeru K. Suzuki
By performing MHD simulations, we investigate the mass loss of intermediate- and low-mass stars from main sequence (MS) to red giant branch (RGB) phases. Alfven waves, which are ex…